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alphys animal_crossing anthro asgore_dreemurr asriel_dreemurr avian axe beard bird boss_monster bottomless canine caprine clothed clothing crown dog dogamy dogaressa duck facial_hair female fully_clothed ghost headphones horn lizard long_ears male mammal melee_weapon monster_kid napstablook nintendo papyrus_(undertale) penguin reptile sans_(undertale) scalie scarf spirit tomatoterror toriel undertale video_games weapon absolutely_everyone animated_skeleton asriel_dreemurr asriel_dreemurr_(god_form) bone boss_monster caprine flora_fauna group human humanoid mammal muffet napstablook plant poster protagonist_(undertale) sans_(undertale) skeleton square_crossover tagme toriel undead undertale undyne video_games 2017 2018 all_fours ambiguous_gender ambiguous_penetration bangs blue_body blush brown_hair butt chara_(undertale) child clothed clothing collaboration color_edit colored crying digital_media_(artwork) doggystyle drooling edit eyelashes forced forced_incest forced_partners from_behind_position frown fully_clothed ghost girly group hair happstablook happy holding_object holding_phone human j444 japanese_text knife letter_l line_art lying mammal napstablook not_furry on_front open_mouth penetration phone pink_body puddle pussy_juice pussy_juice_splatter recording rough_sex saliva sex short_hair smile spirit standing tears text toony torogao translation_request undertale vertical_bar_eyes video_games wince young bare_shoulder clothing dialogue frown ghost girly headphones machine male monochrome napstablook not_furry restricted_palette robot sad shaking solo spirit toddnet trembling undertale video_games 2015 adventure_time alien ambiguous_gender burgerpants cartoon_network crossover dragon_ball female frieza gem_(species) ghost machine male marceline_abadeer mettaton mettaton_ex napstablook natouu pearl_(steven_universe) robot spirit steven_universe undertale vampire video_games zarbon black_and_white chair comic english_text ghost machine mettaton monochrome napstablook robot solo speech_bubble spirit squatlord text undertale video_games comic dialogue duo english_text fire ghost machine mettaton napstablook robot speech_bubble spirit squatlord text undertale video_games <3 absolutely_everyone alligator alphys animated_skeleton annoying_dog_(undertale) arachnid arthropod asgore_dreemurr asriel_dreemurr asriel_dreemurr_(god_form) axe beard bone boss_monster bratty_(undertale) burgerpants canine caprine cat catty_(undertale) chara_(undertale) crocodilian delta_rune dog dogamy dogaressa doggo english_text eye_patch eyewear facial_hair feline fish flora_fauna flowey_the_flower gerson ghost glasses greater_dog group hood horn human lacardozarojas lagomorph lesser_dog lizard machine mammal marine melee_weapon mettaton mettaton_ex mettaton_neo model_sheet monster_kid muffet napstablook nicecream_man papyrus_(undertale) photoshop_flowey plant polearm protagonist_(undertale) rabbit rabbit_shopkeeper reptile river_person_(undertale) robot sans_(undertale) scalie skeleton spider spirit sword temmie_(undertale) text toriel turtle undead undertale undyne undyne_the_undying video_games weapon alligator arachnid arthropod bratty_(undertale) burgerpants cat catty_(undertale) chara_(undertale) crocodilian elemental feline fire_elemental gerson ghost grillby human lagomorph mammal model_sheet muffet napstablook nicecream_man potoobrigham rabbit reptile scalie spider spirit turtle undertale video_games alphys animated_skeleton asgore_dreemurr asriel_dreemurr bone boss_monster caprine english_text eye_patch eyewear fish fofufofu ghost glasses group hand_holding human lizard machine mammal marine mettaton monster_kid napstablook papyrus_(undertale) protagonist_(undertale) reptile robot sans_(undertale) scalie simple_background skeleton spirit striped_sweater text toriel undead undertale undyne video_games white_background <3 2015 ambiguous_gender anthro arachnid arthropod bed binoculars blush boss_monster cactus cake caprine cellphone comic dialogue english_text female finger_gun fire flora_fauna flower flowey_the_flower food forest gastropod ghost goat group hi_res holding_object horn humor knife male mammal napstablook nightmargin phone pie plant pun restricted_palette sleeping snail sound_effects spider spirit text toriel tree undertale video_games zzz black_hair blue_hair dj_booth female fish ghost hair headphones humanoid machine male marine mettaton mettaton_ex microphone napstablook processormalfunction robot shiny shyren singing sparkle spirit stage undertale video_games <3 alcohol alpha_channel alphys annoying_dog_(undertale) asgore_dreemurr asriel_dreemurr beverage bone boss_monster bottle brother canine cape caprine chara_(undertale) clothed clothing cocktail cousins creepy crossdressing crown dog dress elemental eye_patch eyewear fairy female fire fire_elemental fish flora_fauna flower flowey_the_flower food gaster gaster_blaster ghost goat grillby hi_res horn human ketchup lamey-ami lizard male mammal marine melee_weapon mettaton monochrome napstablook papyrus_(undertale) pie plant polearm protagonist_(undertale) reptile sans_(undertale) scalie sibling skeleton skull spear spirit tem temmie_(undertale) thorns toriel undertale undyne video_games weapon web whimsum wingdings <3 <3_eyes 2015 absolutely_everyone alligator alphys ambiguous_gender amphibian animated_skeleton annoying_dog_(undertale) anthro arachnid armless arthropod asgore_dreemurr asriel_dreemurr bone boss_monster bow_tie bratty_(undertale) breasts burgerpants canine caprine cat catty_(undertale) chara_(undertale) crocodilian dog dogamy dogaressa doggo dummy elemental feline female fire_elemental fish flora_fauna flower flowey_the_flower food frog froggit gerson ghost goat greater_dog grillby group hi_res horn hot_dog human kissing knife leaves lesser_dog lizard machine mad_dummy male mammal marine mel12da_(artist) melee_weapon mettaton mettaton_ex microphone monster_kid muffet napstablook nice_cream_vendor nicecream_man papyrus_(undertale) pasta pie plant polearm protagonist_(undertale) reptile rg01_(undertale) rg02_(undertale) robot royal_guards sans_(undertale) scalie shield shyren simple_background skeleton spaghetti sparkles spear spider spirit star striped_shirt tem temmie_(undertale) toriel turtle umbrella undead undertale undyne video_games weapon web white_background commentary crossover english_commentary full_moon gen_7_pokemon headphones lunala moon napstablook pokeball_symbol pokemon pokemon_(creature) sa-dui signature space_print spread_wings starry_sky_print undertale 2016 alphys animated_skeleton anthro armless asgore_dreemurr asriel_dreemurr beach big_breasts bikini bone boss_monster breasts caprine chara_(undertale) cleavage clothed clothing female fish gaster ghost goat group human lizard machine male mammal marine mature_female mettaton monster_kid napstablook papyrus_(undertale) photo polarissketches protagonist_(undertale) reptile robot sans_(undertale) scalie seaside skeleton smile spirit swimsuit toriel undead undertale undyne video_games 2016 alphys animated_skeleton anthro armless asgore_dreemurr asriel_dreemurr beach big_breasts bikini bone boss_monster breasts caprine chara_(undertale) cleavage clothed clothing female fish gaster ghost goat group human lizard machine male mammal marine mature_female mettaton monster_kid napstablook papyrus_(undertale) photo polarissketches protagonist_(undertale) reptile robot sans_(undertale) scalie seaside skeleton smile spirit swimsuit toriel undead undertale undyne video_games 2016 alphys animated_skeleton anthro armless asgore_dreemurr asriel_dreemurr beach big_breasts bikini bone boss_monster breasts caprine chara_(undertale) cleavage clothed clothing female fish gaster ghost goat group human lizard machine male mammal marine mature_female mettaton monster_kid napstablook papyrus_(undertale) photo polarissketches protagonist_(undertale) reptile robot sans_(undertale) scalie seaside skeleton smile spirit swimsuit toriel undead undertale undyne video_games 2016 english_text ghost hi_res machine male mettaton mettaton_ex napstablook not_furry polarissketches robot shiny spirit text undertale video_games 2018 ambiguous_gender blush cum duo human japanese_text kageyama male mammal napstablook open_mouth penis simple_background solo_focus sweat tears text undertale video_games <3 alphys canine clothing dessert dog dogamy dogaressa duo elemental eye_patch eyewear facial_hair fire_elemental fish food ghost glasses grillby headphones ice_cream lizard machine mammal marine mettaton mustache napstablook necktie reptile robot scalie solo spirit suit undertale undyne video_games yamsgarden alphys animated_skeleton annoying_dog_(undertale) asgore_dreemurr asriel_dreemurr bone boss_monster canine caprine chara_(undertale) dog fairy fish ghost human lizard machine mammal marine mettaton monster_kid napstablook nintendo papyrus_(undertale) protagonist_(undertale) reptile robot rokuyon sans_(undertale) scalie skeleton spirit the_legend_of_zelda toriel undead undertale undyne video_games <3 2016 3ds 4_fingers aircraft alphys ambiguous_gender animal_humanoid animated_skeleton annoying_dog_(undertale) arachnid armless arthropod asgore_dreemurr asriel_dreemurr bag barefoot beard beverage black_hair black_sclera blonde_hair blue_eyes blue_hair blue_skin blush bone boots boss_monster brother brown_fur brown_hair buckteeth building burgerpants canine caprine carpet cat chara_(undertale) child clothed clothing coat cousin cub dog empty_eyes english_text excited eye_patch eyelashes eyes_closed eyewear facial_hair family fangs father feline female fin fish food footwear fully_clothed fur gaster ghost gills glasses gloves goat groceries group hair hair_bow hair_over_eye hair_ribbon hair_tuft happy hat hatchling hoodie horn house human humanoid jacket japanese_food japanese_text kotatsu lava living_aircraft living_machine living_room lizard long_ears looking_at_viewer lying machine male mammal marine metal mettaton microphone monster_kid mother muffet multi_arm multi_eye multi_limb napstablook nintendo nyusu_ut on_back on_front open_mouth papyrus_(undertale) parent pawpads playing pointing protagonist_(undertale) purple_skin red_eyes red_hair reptile ribbons robe robot sans_(undertale) scalie scarf sharp_teeth shyren sibling sitting skeleton sleeping slightly_chubby smile soda spider spider_humanoid spikes spirit striped_topwear stripes sweat sweater tea tea_pot teeth television tem temmie_(undertale) text tongue tongue_out toriel translated tsunderplane undead undertale undyne video_games vulkin white_fur yellow_skin young absurdres alphys androgynous animal_ears anniversary annoying_dog armor asgore_dreemurr bird_that_carries_you_over_a_disproportionately_small_gap black_hair black_sclera blonde_hair blue_skin bratty_(undertale) brown_hair burgerpants catty_(undertale) closed_eyes commentary_request crown dogamy dogaressa doggo everyone eyepatch fang final_froggit flower flowey_(undertale) frisk_(undertale) froggit glasses gloves goat_ears grin head_fins highres horns houten_(dre_a_mer) long_sleeves mettaton moldsmal monster_boy monster_girl monster_kid_(undertale) muffet multiple_boys multiple_girls napstablook nice_cream_guy one_eye_closed open_mouth papyrus_(undertale) photoshop_flowey polearm ponytail purple_skin red_hair royal_guard_01_(undertale) royal_guard_02_(undertale) sans scarf sharp_teeth shirt short_hair shorts shyren skeleton slippers smile snowman striped striped_shirt teeth temmie toriel undertale undyne vegetoid weapon whimsalot whimsun yellow_sclera yellow_skin <3 alphys animated_skeleton asgore_dreemurr asriel_dreemurr bone boss_monster caprine child clear_sky delta_rune english_text father fish ghost goat group hand_holding human humanoid letters lizard machine mammal marine mettaton mother napstablook papyrus_(undertale) parent protagonist_(undertale) reptile robot sans_(undertale) scalie skeleton snow spirit text toriel undead undertale undyne video_games young yourmobi big_breasts big_penis blush breasts comic crossgender digital_media_(artwork) female ghost human male mammal napstablook penis phasing_through precum protagonist_(undertale) spirit text thewill under(her)tail undertale video_games blush breasts comic crossgender digital_media_(artwork) female ghost human lying male mammal napstablook protagonist_(undertale) spirit sweat tears text thewill under(her)tail undertale video_games big_breasts blush boss_monster breasts bulge clothing comic crossgender digital_media_(artwork) female human lying male mammal masturbation napstablook protagonist_(undertale) spread_legs spreading sweat text thewill toriel under(her)tail undertale video_games blue_shirt blue_shorts brown_hair cd closed_eyes ctr facing_viewer frisk_(undertale) ghost headphones keyboard_(computer) long_sleeves monitor napstablook nebula parted_lips refrigerator sasa_kichi shirt shoes shorts silk solid_oval_eyes space spider_web star_(sky) undertale absurd_res dialogue english_text floating fluffymilktea ghost headphones hi_res machine mettaton microphone napstablook robot running spirit text undertale video_games <3 alphys ambiguous_gender anthro armless asgore_dreemurr asriel_dreemurr bone boss_monster bow_tie burgerpants caprine cat chara_(undertale) creating_art drawing dummy elemental eye_patch eyewear feline female fire fire_elemental fish food gaster ghost glasses goat grillby group hi_res human knife lagomorph lizard locket machine mad_dummy male mammal marine marker_(artwork) mettaton mettaton_ex middle_finger monster_kid napstablook nicecream_man noodles papyrus_(undertale) protagonist_(undertale) rabbit reptile robot sans_(undertale) scalie skeleton spirit tem temmie_(undertale) traditional_media_(artwork) undertale undyne video_games waitingmatter anthro balls blue_cum blush colored_cum crying cum cum_inside cum_on_body cumshot duo ejaculation erection ghost hands-free male male/male mettaton_ex napstablook one_eye_closed open_mouth orgasm pink_cum simple_background spirit tears text undertale unknown_artist unusual_cum video_games <3 caught computer computer_mouse cord desk drawing duo fellatio female ghost happstablook inside keyboard male male/female mammal monitor napstablook oral sex spirit stylus tablet text undertale unknown_artist video_games <3 blush crying female ghost happstablook mad_dummy male male/female napstablook open_mouth simple_background spirit tears text undertale unknown_artist video_games white_background ambiguous_gender clothing crying duo erection ghost gloves handjob machine male mettaton napstablook open_mouth penis sex simple_background spirit tears text tinybeasts uncut undertale video_games alphys animated_skeleton asriel_dreemurr bone boss_monster caprine comic dialogue endogeny english_text eyewear fangs food fruit fur ghost glasses goat halloween hat headphones holidays horn human humor lizard long_ears mammal monster_kid napstablook papyrus_(undertale) potoobrigham protagonist_(undertale) pumpkin reptile sailor_moon_(series) sans_(undertale) scalie scarf skeleton spirit text top_hat undead undertale video_games white_fur ! ? ambiguous_gender anthro blush bulge candy colorful confusion costume cute da~blueguy english_text eyes_closed food frown ghost headphones hug invalid_tag male male/ambiguous male_prey music napstablook oral_vore same_size simple_background spirit surprise text tongue undertale unwilling_pred video_games vore <3 2017 alphys alternate_species ambiguous_gender animated_skeleton annoying_dog_(undertale) asgore_dreemurr avimedes bird's-eye_view black_hair black_sclera blep blonde_hair blue_body blue_clothing blue_topwear blush bone bottomless brown_hair brown_tail canine chara_(undertale) clothed clothed_feral clothing crossover crying curved_horn cutie_mark digital_drawing_(artwork) digital_media_(artwork) digitigrade distracting_watermark dog duo_focus ear_frills ears_back earth_pony elemental equine eye_contact eye_patch eyelashes eyes_closed eyewear female feral fire fire_elemental fish flora_fauna flower flowey_the_flower frill frown fuku_fire girly glasses green_fire grey_body grillby group hair heart_marking hi_res high-angle_view horn horse hybrid kemono lighting long_hair looking_at_another looking_at_viewer looking_up lying male mammal marine mettaton mettaton_ex monster_kid my_little_pony napstablook no_pupils on_side open_mouth papyrus_(undertale) pince-nez pink_clothing pink_topwear plant pony protagonist_(undertale) quadruped red_eyes red_hair sans_(undertale) scarf shadow short_hair skeleton sleeping smile striped_clothing striped_topwear taiwanese tears tongue tongue_out toriel translucent translucent_body two_tone_clothing two_tone_topwear undead undertale undyne unicorn unicorn_horn vertical_bar_eyes video_games watermark white_body white_horn yellow_body yellow_eyes 2016 alphys ambiguous_gender animal_humanoid animated_skeleton anthro asgore_dreemurr beard biped black_sclera bone boss_monster brown_hair brown_theme camera candle caprine child clothed clothing detailed digital_media_(artwork) digital_painting_(artwork) ear_frills english_text evil_grin eye_patch eyewear facial_hair female fire fish fish_humanoid flora_fauna flowey_the_flower food frill ghost group hair holding_camera holding_object holiday_message holidays hoodie human humanoid humanoid_hands ketchup knife lighting looking_at_another looking_down male mammal marine monster_kid napstablook nervous one_eye_closed papyrus_(undertale) pi_day pie plant plate ponytail protagonist_(undertale) reptile sans_(undertale) scalie sharp_teeth shirt short_hair skeleton smile spirit sweat sweatdrop table teeth text toriel undead undertale undyne velocesmells vertical_bar_eyes video_games warm_colors watermark whipped_cream white_eyes yellow_skin young <3 alphys ambiguous_gender animated_skeleton arachnid arthropod asgore_dreemurr asriel_dreemurr bone boss_monster caprine chara_(undertale) english_text eye_patch eyewear female flora_fauna flowey_the_flower ghost glasses goat group hat human humanoid lizard machine mad_dummy male mammal melee_weapon mettaton monster_kid muffet musical_instrument napstablook papyrus_(undertale) peanuts piano plant polearm protagonist_(undertale) reptile robot salihombox sans_(undertale) scalie skeleton spear spider spirit style_parody text top_hat toriel undead undertale undyne video_games weapon big_breasts breasts crossgender crying digital_media_(artwork) female flower ghost hair hat headphones long_hair napstablook plant spirit tears thewill translucent undertale video_games 2015 4_toes absurd_res anthro belt black_nose blush canine claws clothing digital_media_(artwork) dog dog_treat doggo eyes_closed fur group hi_res human lesser_dog looking_at_viewer male mammal napstablook navel pants protagonist_(undertale) shirt smile smoking solo_focus spazzyhusky tank_top toe_claws toes undertale video_games vulkin white_fur