2023 2_horns anthro balancing black_boots black_clothing black_footwear black_liquid black_spandex blonde_hair blue_hair bone boots clothing colored cosplay costume crossover crossover_cosplay deer deltarune digital_media_(artwork) ditchu english_text female footwear gaster group hair hi_res hole_(anatomy) horn human jumping kris_(deltarune) male mammal marvel mask motion_lines noelle_holiday pattern_background pixel_(artwork) purple_hair purple_spandex red_nose reptile scalie short_tail signature simple_background skeleton spandex spider-man_(series) superhero superhero_costume susie_(deltarune) tail text tight_clothing undertale undertale_(series)  absurd_res alternate_species blue_clothing blue_sweater blue_topwear bodysuit boss_monster bovid caprine clothing fur gaster goat hi_res mac_daddy male mammal papyrus_(undertale) red_scarf sans_(undertale) scarf skinsuit slippers sweater sweatpants tight_clothing topwear undertale undertale_(series) w.d_gaster white_body white_fur  <3 2023 alphys animated_skeleton anus artist_name big_dom_small_sub black_sclera blush bodily_fluids bone bow_underwear breasts butt butt_grab clothing dialogue digital_media_(artwork) distracted_sex dominant duo emanata english_text eyewear eyewear_on_head fake_cat_ears fake_ears female female_penetrated flat_colors floating_hands footwear footwear_only from_behind_position gaster genitals glasses glasses_on_head gradient_penis green_background hand_on_butt hi_res humanoid humanoid_genitalia humanoid_penis kissing leaning_over lizard male male/female male_penetrating male_penetrating_female mew_mew_(undertale) mew_mew_kissy_cutie mostly_nude motion_lines navel one_tooth onomatopoeia penetration penis pink_clothing pink_footwear pink_socks plushie pupils pussy reptile scalie sequence sex simple_background sitting size_difference skeleton slam small_breasts small_tail snaggle_tooth socks socks_only sound_effects spread_legs spreading surprise sweat table_sex tail talking_to_another teebsly television text undead undertale undertale_(series) underwear vaginal vaginal_penetration white_body white_clothing white_penis white_pupils white_skin white_text white_underwear wingdings yellow_body yellow_skin  2020 alphys ambiguous_gender animal_humanoid animated_skeleton annoying_dog_(undertale) anthro arachnid arthropod asgore_dreemurr asriel_dreemurr_(god_form) bone bovid caprine clothed clothing digital_drawing_(artwork) digital_media_(artwork) dummy_(undertale) english_text female fish fish_humanoid flowey_the_flower frisk_(undertale) gaster ghost goat hi_res human humanoid lizard male mammal marine marine_humanoid mettaton mettaton_ex monster_kid muffet napstablook nelnal papyrus_(undertale) reptile sans_(undertale) scalie skeleton spider spirit text toriel undead undertale undertale_(series) undyne  5_fingers absurd_res angry_expression angry_eyes anthro apocalypse attack_on_titan axe bangs black_sclera blonde_hair blood blue_body blue_eyes blue_skin bodily_fluids bone bottomwear bovid breasts brown_body brown_fur brown_hair buckteeth capreoline caprine clenched_teeth clothed clothing colored crossover crying dark_hair darkner deer delta_rune_(emblem) deltarune duo embrace eyewear female fingers floppy_ears footwear freckles frown fur gaster glasses goat group hair heart_(marking) heart_locket hi_res hole_(anatomy) hole_in_chest hopelessness horn horrified horror_(expression) hug hugging_from_behind human humanoid jacket kneeling kris_(deltarune) landscape landscape_background light light_beam lighting lizard long_image looking_up macro male mammal marching micro mountain noelle_holiday open_mouth orange_eyes parody pendant pink_eyes plant purple_body purple_skin raising_arm ralsei red_eyes red_nose reindeer reptile running sad scalie scared scared_face scarf shaded shadow shirt shoes skeleton skirt smile smoke solo soul spikes spikes_(anatomy) spread_arms sunbeam sunlight susie_(deltarune) sweater symbol tall_image tears teenager teeth terrifying text titan_(attack_on_titan) titan_(deltarune) topwear tree trio undertale undertale_(series) white_body white_clothing white_fur white_shirt white_topwear wide_eyed wounded yellow_sclera young young_female young_male yukimura4  absurd_res animated_skeleton bed bone clothing furniture gaster hi_res humanoid lotusthekat male papyrus_(undertale) sad sans_(undertale) shirt skeleton sleeping topwear undead undertale undertale_(series) video_games  absurd_res ambiguous_gender animated_skeleton bone bottomwear clothed clothing frisk_(undertale) furniture gaster group hi_res human humanoid lotusthekat male mammal not_furry_focus pants papyrus_(undertale) sans_(undertale) shirt skeleton sleeping sofa text tired topwear undead undertale undertale_(series) video_games  absurd_res ambiguous_gender animated_skeleton bone book bottomwear bovid caprine clothing dialogue embrace female frisk_(undertale) furniture gaster goat group hair hi_res horn hug human humanoid lamp lotusthekat male mammal pants papyrus_(undertale) sans_(undertale) skeleton sleeping sofa text tired toriel undead undertale undertale_(series) video_games  alphys animated_skeleton anthro blush bone clothing duo english_text eyewear fake_cat_ears fake_ears female fingering fingering_partner gaming gaster genitals glasses groping_breasts hi_res humanoid humanoid_on_anthro larger_male lizard mad_mew_mew male male/female nipple_fetish nipple_pinch nipple_play overweight panties pinch playing_videogame plushie pussy reptile scalie sex size_difference skeleton smaller_female surprise text tinybeasts toony undead undertale undertale_(series) underwear vaginal vaginal_fingering video_games wingdings  bone gaster havesomemoore humanoid monochrome skeleton undertale undertale_(series) video_games w.d_gaster  alphys animated_skeleton anthro anthro_penetrated anus beaker blush bone breasts butt butt_grab clothed clothing coat duo erection eyewear eyewear_only female gaster glasses glasses_only hand_on_butt humanoid humanoid_on_anthro humanoid_penetrating humanoid_penetrating_anthro lab_coat laboratory_equipment laboratory_glassware lizard male male/female male_penetrating_anthro nude penetration penile penile_penetration penis_in_pussy reptile scalie scientific_instrument sex size_difference skeleton small_breasts tinybeasts toony topwear undead undertale undertale_(series) vaginal vaginal_penetration video_games  alphys anthro bed big_breasts big_butt black_and_white blush bodily_fluids boxer_briefs breast_grab breasts bulge butt clothed clothing cuddling duo embrace eyes_closed female furniture gaster hand_on_breast hug humanoid humanoid_on_anthro kneeling lizard male male/female monochrome navel non-mammal_breasts nude open_mouth open_smile panties pastrydog pillow reptile scalie simple_background smile sweat thick_tail topless undertale undertale_(series) underwear video_games  <3 alphys anthro big_breasts black_nails breasts card cleavage cleavage_overflow clothed clothing coat collar colored_nails dress duo eyewear female front_view fur_collar gaster glasses gloves handwear heart_glasses humanoid jacket lab_coat lizard looking_at_viewer nails non-mammal_breasts open_mouth open_smile pastrydog playing_card pose reptile scales scalie side_view simple_background smile sparkles spiked_collar spikes topwear undertale undertale_(series) video_games white_body yellow_body yellow_scales  absurd_res alphys anthro award award_ribbon black_body blueprint clothing coat cookware detailed_background dialogue doorway egg egg_carton english_text eyewear female food fried_egg front_view frying_pan gaster gaster_follower_1 glasses group hi_res holding_food holding_object holding_pan humanoid humor kitchen_utensils lizard looking_up male mask meanpersonaart multiple_images open_mouth open_smile rear_view reptile scales scalie simple_background smile speech_bubble spines standing tail_spines text thick_tail three-quarter_view tools topwear trio undertale undertale_(series) video_games yellow_body yellow_scales yellow_spines  absurd_res ambiguous_gender anthro armless avian backlighting beak bird black_body bone bottomwear claws clothing coat delta_rune_(emblem) domestic_cat dramatic_lighting empty_eyes eyeless felid feline felis footwear foreshortening gaster gaster_follower_1 gaster_follower_2 gaster_follower_3 goner_kid grey_body group hand_on_face hands_behind_back hi_res high-angle_view lab_coat light lighting male mammal mask meanpersonaart noseless open_mouth open_smile pants reptile scalie shoes skull smile standing sweater symbol topwear tuxedo_vest undertale undertale_(series) vest video_games  alphys anthro black_body bottomwear climbing clothed clothing coat delta_rune_(emblem) detailed_background dialogue english_text eyewear female flowing_clothing footwear front_view fully_clothed gaster gaster_follower_1 glasses group harness hi_res humanoid humor lab_coat looking_at_viewer looking_up male mask meanpersonaart metal_plates multiple_images name_tag open_mouth open_smile pants railing rear_view scales shirt shoes simple_background smile sparkles speech_bubble standing sweater symbol text three-quarter_view topwear trio undertale undertale_(series) video_games walking yellow_body yellow_scales  absurd_res all_fours alphys ambiguous_gender animated_skeleton anthro armless black_body blowtorch blush blush_stickers bone bottomwear buckteeth climbing clothed clothing coat delta_rune_(emblem) dialogue empty_eyes english_text eyewear female fully_clothed gaster gesture glasses goner_kid harness hi_res hip_flask humanoid lizard looking_at_another male mask meanpersonaart musical_note name_tag pants pointing pointing_at_another reptile sans_(undertale) scales scalie shirt simple_background skeleton speech_bubble spines standing straw symbol tail_spines teeth text thick_tail topwear undead undertale undertale_(series) v_sign video_games welding yellow_body yellow_scales yellow_spines  ! alphys anthro avian beak big_eyes bird black_body blue_body blue_fur blush blush_stickers brown_body clipboard clothing coat coffee_mug comic dialogue domestic_cat english_text eyes_closed eyewear felid feline felis female fur gaster gaster_follower_1 gaster_follower_2 gaster_follower_3 gesture glasses holding_mug holding_object humanoid humor lizard male mammal meanpersonaart mug pointing pointing_at_another reptile scales scalie shirt simple_background speech_bubble standing text thick_tail topwear undertale undertale_(series) video_games whiskers yellow_body yellow_scales  alphys animated_skeleton anthro bone bovid canid canine caprine clothed clothing felid feline gaster gaster_follower group hair mammal momo320 open_mouth reptile sans_(undertale) scalie skeleton studying tem temmie_(undertale) text topwear undead undertale undertale_(series) video_games white_body  alphys animal_humanoid annoying_dog_(undertale) anthro arachnid arthropod asgore_dreemurr asriel_dreemurr asriel_dreemurr_(god_form) bone bovid canid canine caprine chara_(undertale) clothed clothing felid feline fish fish_humanoid flower flowey_the_flower fur gaster ghost goat grillby hair happy hi_res human humanoid lexezombie machine mammal marine marine_humanoid mettaton monster_kid muffet napstablook open_mouth papyrus_(undertale) plant protagonist_(undertale) reptile robot sans_(undertale) scalie simple_background smile spider spirit tem temmie_(undertale) topwear toriel undead undertale undertale_(series) undyne video_games white_body white_fur  absurd_res alphys ambiguous_gender animated_skeleton annoying_dog_(undertale) anthro asgore_dreemurr asriel_dreemurr biped blue_body blue_skin blush blush_lines bone boots bovid brown_hair canid canine canis caprine clothing coat domestic_dog elemental_creature female feral flora_fauna flowey_the_flower footwear fur gaster gastropod ghost goat group hair hi_res human humanoid jacket lab_coat lying machine male mammal melee_weapon mettaton_ex mollusk monster_kid muffet napstablook nuba_ball on_back open_mouth papyrus_(undertale) plant polearm quadruped robe robot sans_(undertale) scalie shirt skeleton smile snail spear spirit tank_top temmie_(undertale) topwear toriel trident undead undertale undertale_(series) undyne video_games weapon white_body white_fur yellow_body yellow_skin  animated_skeleton big_penis blue_blush blue_penis blush bone bottomless bottomwear clothed clothing comic dialogue duo english_text eyes_closed footwear gaster genitals grin hi_res huge_penis humanoid humor hyper hyper_genitalia hyper_penis kneeling magpiesins male not_furry onomatopoeia penis proboscis_(anatomy) sans_(undertale) shirt shove simple_background skeleton smile socks sound_effects teeth text topwear trunk_(anatomy) undead undertale undertale_(series) unusual_anatomy unusual_genitalia unusual_penis video_games white_background white_body white_clothing white_footwear white_shirt white_socks white_topwear wiggle  animated_skeleton big_penis blue_penis blush bone bottomless bottomwear clothed clothing comic dialogue duo english_text gaster genitals grin huge_penis humanoid humor hyper hyper_genitalia hyper_penis magpiesins male not_furry penis proboscis_(anatomy) sans_(undertale) shirt simple_background skeleton smile teeth text topwear trunk_(anatomy) undead undertale undertale_(series) unusual_anatomy unusual_genitalia unusual_penis video_games white_background white_body white_clothing white_shirt white_topwear  anthro asgore_dreemurr bovid caprine chubby_male duo efryol frottage gaster genitals goat hi_res humanoid kissing male male/male mammal muscular penis sex slightly_chubby undertale undertale_(series) video_games  2_frame_animation alphys amalgamate animated annoying_dog_(undertale) anthro asgore_dreemurr bovid box bratty_(undertale) canid canine caprine castle catty_(undertale) clothed clothing container dogamy dogaressa felid feline female final_froggit footwear froggit fur gaster goat greater_dog grillby group hair lemon_bread mad_dummy madjick male mammal mettaton mettaton_ex monster monster_kid muffet napstablook nicecream_man open_mouth opuntie papyrus_(undertale) protagonist_(undertale) sans_(undertale) short_playtime simple_background snowdrake tem temmie_(undertale) text topwear toriel tsunderplane undertale undertale_(series) undyne video_games white_body white_fur woshua  2021 5_fingers bald bird_cage bottomwear bright-goat clothing creepy creepy_smile darkner deltarune dummy empty_eyes eyewear fingers fool's_hat footwear gaster glasses greyscale grin hat headgear headwear hi_res humanoid humanoid_pointy_ears imp inside jester jevil_(deltarune) male monochrome pants pointy_nose puppet sharp_teeth shoes smile spamton_g._spamton spooky_(disambiguation) suit teeth undertale undertale_(series) ventriloquism video_games white_body  1:1 absurd_res alphys anthro anus big_butt black_eyes blush bodily_fluids bottomless butt butt_grab chair choker clothed clothing clothing_aside clothing_pull colored_nails delta_rune_(emblem) duo empty_eyes english_text erection female footwear furniture gaster genitals green_eyes hand_on_butt hand_on_face hi_res huge_butt huge_hips humanoid humanoid_genitalia humanoid_on_anthro humanoid_penis jewelry kneeling lizard looking_at_another looking_at_partner makeup male male/female mascara mew_mew_(undertale) mew_mew_kissy_cutie nails necklace nervous on_lap open_mouth open_smile panties panties_aside panty_pull partially_(disambiguation) pastrydog penis pussy reptile rolled_up_shirt scales scalie shirt signature simple_background smile socks suntan sweat symbol tan_line text thick_thighs topwear turtleneck undertale underwear underwear_aside underwear_pull video_games wavy_mouth white_body white_skin wide_hips yellow_body yellow_scales  <3 <3_necklace 5:4 absurd_res alphys anthro black_sclera blush bodily_fluids bottomless bottomwear bra breasts buckteeth butt butt_grab cleavage clothed clothing coat colored_nails duo english_text eyewear female front_view fully_clothed gaster genitals glasses green_eyes hand_on_butt hi_res humanoid humanoid_on_anthro jewelry lab_coat leg_grab lizard looking_aside looking_at_another looking_at_partner makeup male male/female mascara medium_breasts nails narrowed_eyes navel necklace nervous non-mammal_breasts open_clothing open_coat open_mouth open_smile open_topwear pants pastrydog pussy reptile rolled_up_sleeves scales scalie signature simple_background skimpy smile sweat teeth text thick_thighs thigh_grab topwear turtleneck undertale underwear video_games wavy_mouth white_body white_eyes white_skin wide_hips yellow_body yellow_scales  alphys animated_skeleton anthro bone bovid canid canine caprine clothed clothing felid feline gaster gaster_follower group hair mammal momo320 open_mouth reptile sans_(undertale) scalie skeleton studying tem temmie_(undertale) text topwear undead undertale video_games white_body  <3 all_fours animated_skeleton arms_tied big_dom_small_sub blindfold blush bone bound collar dialogue doggystyle domination english_text father father_and_child father_and_son from_behind_position gaster good_boy hands_behind_back humanoid incest_(lore) leash male male/male male_domination parent parent_and_child pet_praise power_bottom queentexx sans_(undertale) sex size_difference skeleton son submissive submissive_male tentacles text translated undead undertale video_games wingdings  ahoge black_hair canid canine clothed clothing duo eyes_closed felid feline feral fur gaster hair humanoid low_res mammal petite-pumpkin simple_background tem temmie_(undertale) undertale video_games white_body white_fur  allesiathehedge animated_skeleton anthro bone clothing comic english_text gaster humanoid male mammal not_furry sans_(undertale) skeleton text undead undertale video_games  absolutedream animated_skeleton bone comic dialogue digital_media_(artwork) english_text flashlight gaster hi_res memories not_furry papyrus_(undertale) phone sans_(undertale) silhouettes skeleton solo text undead undertale video_games  all_fours anthro bratty_(undertale) butt canid canine canis catty_(undertale) collar crocodile crocodilian crocodylid dogamy dogaressa doggo domestic_cat domestic_dog domination elemental_creature feet felid feline felis female fire fire_creature first_person_view fish flowey_the_flower fuku_fire gaster genitals gills greater_dog greyscale group haaru hair hi_res human leash lesser_dog long_hair male male_domination mammal marine mettaton monochrome on_stage penis plant ponytail public_humiliation reptile royal_guard_(undertale) royal_guard_1 royal_guard_2 scalie shyren temmie_(undertale) undertale undyne video_games  <3 all_fours anthro butt canid canine canis collar crocodile crocodilian crocodylid dialogue dogamy dogaressa doggo domestic_cat domestic_dog domination elemental_creature english_text feet felid feline felis female fire fire_creature first_person_view fish flowey_the_flower from_behind_position gaster genitals gills good_girl greyscale group haaru hair hi_res human human_on_anthro interspecies leash lesser_dog long_hair male male/female male_domination male_on_anthro mammal marine mettaton monochrome on_stage penis plant ponytail public_humiliation reptile royal_guard_(undertale) royal_guard_1 royal_guard_2 scalie sex temmie_(undertale) text undertale undyne video_games  blade_arm bone clothed clothing fan_character furadon gaster hi_res male monochrome monster nightmare_fuel partially_clothed skeleton solo text undertale video_games weapon  2018 4_fingers anthro backlighting belly belly_overhang big_belly big_breasts black_clothing black_eyeshadow black_hair black_shirt black_topwear bottomwear breasts catti_(deltarune) cellphone clothed clothing curvy_figure deep_navel deltarune digital_media_(artwork) domestic_cat don_ko ear_piercing ear_ring english_text eyeshadow felid feline felis female fingers front_view fur gaster grainy hair half-closed_eyes hi_res highlights_(coloring) holding_object holding_phone light lighting looking_at_viewer makeup mammal mascara mew_mew_(undertale) mew_mew_kissy_cutie midriff narrowed_eyes navel open_mouth overweight overweight_female phone piercing pink_bottomwear pink_clothing pink_highlights pink_nose pink_shorts portrait shirt shorts solo text thick_thighs three-quarter_portrait topwear undertale video_games voluptuous white_body white_fur wide_hips yellow_sclera  2018 4_fingers anthro areola backlighting belly belly_overhang big_belly big_breasts black_clothing black_eyeshadow black_hair black_nipples black_shirt black_topwear bottomwear breasts catti_(deltarune) cellphone clothed clothing curvy_figure deep_navel deltarune digital_media_(artwork) domestic_cat don_ko ear_piercing ear_ring eyeshadow felid feline felis female fingers front_view fur gaster grainy grumpy hair half-closed_eyes hi_res highlights_(coloring) holding_object holding_phone light lighting looking_at_viewer makeup mammal mascara mew_mew_(undertale) mew_mew_kissy_cutie narrowed_eyes navel nipples overweight overweight_female phone piercing pink_bottomwear pink_clothing pink_highlights pink_nose pink_shorts portrait raised_clothing raised_shirt shirt shorts solo thick_thighs three-quarter_portrait topwear undertale video_games voluptuous white_body white_fur wide_hips yellow_sclera  <3 absolutely_everyone abstract_pattern alphys amalgamate ambiguous_gender animal_humanoid animated_object animated_skeleton arachnid arachnid_humanoid arthropod arthropod_humanoid asgore_dreemurr asriel_dreemurr astigmatism avian bird black_clothing black_shirt black_topwear blue_body blue_jacket bone boss_monster bottomwear bovid brown_hair canid canine canis caprine chara_(undertale) clasped_hands clothing cloud crown detail detailed dogamy dogaressa domestic_dog dragging dummy_(undertale) ear_fins endogeny eye_patch eyelashes eyewear fangs female fin fish fish_humanoid floppy_ears flora_fauna floral_pattern flower flowey_the_flower foliage footwear froggit fur gaster geometric_pattern gesture ghost glasses grass green_bottomwear green_clothing green_pants green_shirt green_topwear grey_hair grin group hair hand_holding hi_res holding_object horn human humanoid jerry_(undertale) large_group leading leaf lizard looking_back loox lying mad_dummy madjick male mammal marine marine_humanoid melee_weapon mettaton migosp moldessa moldsmal monster_kid muffet multi_eye napstablook on_front open_mouth open_smile ornate pants papyrus_(undertale) pigtails pillar plant pointing polearm ponytail psychedelic psychedelic_pattern purple_robe reaper_bird red_hair red_scarf reptile rokuyon sans_(undertale) scalie scarf shirt shoes skeleton smile snowdrake spider spider_humanoid spirit standing star striped_shirt sun tan_body tan_skin temmie_(undertale) topwear toriel trident undead undertale undyne vegetoid video_games vines vulkin walking weapon whimsum white_body white_fur woshua yellow_body  bodily_fluids cum gaster genital_fluids hi_res humanoid lizheru male not_furry penis solo tongue undertale video_games  1:1 gaster lizheru not_furry solo undertale video_games  1:1 english_text gaster lizheru not_furry text undertale video_games