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4:3 animated_skeleton bone castle chara_(undertale) clothing elemental_creature fish flora_fauna flower flowey_the_flower frisk_(undertale) gerson group human humanoid mammal marine open_mouth papyrus_(undertale) plant reptile sans_(undertale) scalie skeleton turtle undead undertale undertale_(series) undyne vines animated_skeleton blush bodily_fluids bone clothed clothed_sex clothing comic dialogue english_text exclamation_point eyes_closed female fish flower group heart_symbol hi_res humanoid incest_(lore) inside male male/male marine monochrome multiple_scenes papyrus_(undertale) plant sans_(undertale) sex skeleton solo sweat text undead undertale undertale_(series) undyne unknown_artist animated_skeleton blush bodily_fluids bone clothed clothed_sex clothing comic dialogue english_text exclamation_point eyes_closed female fish group heart_symbol hi_res humanoid incest_(lore) male male/male marine monochrome papyrus_(undertale) question_mark sans_(undertale) sex skeleton sweat text tongue tongue_out undead undertale undertale_(series) undyne unknown_artist animated_skeleton blush bodily_fluids bone clothed clothed_sex clothing comic dialogue duo english_text exclamation_point eyes_closed female fish group heart_symbol hi_res humanoid incest_(lore) male male/male marine monochrome papyrus_(undertale) profanity sans_(undertale) sex skeleton sweat text undead undertale undertale_(series) undyne unknown_artist 1girl 2boys armor bear blue_eyes blush_stickers bone boots bow brothers cape closed_eyes commentary english_text faceplant furry gloves glowing glowing_eyes grin hands_in_pockets height_difference highres holding holding_bone hood hooded_jacket jacket leash looking_at_another loped monster_boy monster_kid_(undertale) multiple_boys outdoors papyrus_(undertale) photoshop_(medium) rabbit red_cape running sans_(undertale) scarf shirt shorts siblings sign size_difference skeleton slippers smile snow striped_clothes striped_shirt sweater tail undertale walking 5:8 absurd_res alphys animated_skeleton annoying_dog_(undertale) anthro asgore_dreemurr asriel_dreemurr_(god_form) blonde_hair bone boss_monster_(undertale) bovid canid canine canis caprine chainsaw clothed clothing crossover domestic_dog doom_(series) english_text eye_patch eyewear female fish frisk_(undertale) glasses glowing group hair heart_symbol hi_res horn human humanoid id_software jerry_(undertale) jewelry knife lizard long_ears machine male mammal marine melee_weapon mettaton mettaton_ex microsoft mountain necklace papyrus_(undertale) parody polearm power_tool reptile robot sans_(undertale) scalie signature skeleton smonkito text tools toriel trident undead undertale undertale_(series) undyne undyne_the_undying weapon 2:3 alphys animated_skeleton anthro asgore_dreemurr beard blonde_hair bone boss_monster_(undertale) bovid caprine comic english_text facial_hair fish frisk_(undertale) hair hi_res horn human humanoid humor lizard long_ears mammal marine papyrus_(undertale) plumfsh reptile sans_(undertale) scalie skeleton text toriel undead undertale undertale_(series) undyne 2:3 ambiguous_gender animated_skeleton artist_name bone boss_monster_(undertale) bovid caprine comic english_text flyer_(pamphlet) goat hi_res humanoid humor mammal pamphlet papyrus_(undertale) plumfsh sans_(undertale) skeleton text toriel undead undertale undertale_(series) url wordplay adelita_sanchez animated_skeleton armor better_version_at_source bone chadrocco clothing crossover dress ellipsis eye_patch eyewear female group humanoid male not_furry papyrus_(undertale) sans_(undertale) scardelita_sanchez sibling_(lore) skeleton smile speech_bubble the_book_of_life twins_(lore) undead undertale undertale_(series) 1:1 2016 animated_skeleton anthro bar black_bars bone boots canid canine canis clothing dogamy dogaressa domestic_dog drunk drunk_bun_(undertale) elemental_creature elemental_humanoid eyewear female fire fire_creature fire_humanoid food footwear furniture glasses gloves greater_dog grillby group handwear humanoid lagomorph leporid letterbox male mammal nervous papyrus_(undertale) rabbit sandals sans_(undertale) scarf skeleton smile substance_intoxication table undead undertale undertale_(series) いか天 2016 animated_skeleton battle blue_and_white bone clothing gaster_blaster glowing glowing_eyes group male monochrome monster sans_(undertale) skeleton smile teeth tori_(pixiv) undead undertale undertale_(series) 2016 3:4 animated_skeleton bone clothing electronics english_text footwear glowing glowing_eyes headphones humanoid male monster not_furry sans_(undertale) skeleton smile solo text undead undertale undertale_(series) 鷹崎 2016 animated_skeleton beach bone clothing eyewear footwear frisk_(undertale) group hat headgear headwear hone human humanoid male mammal monster papyrus_(undertale) sandals sans_(undertale) seaside skeleton smile sunglasses undead undertale undertale_(series) 1:1 animated_skeleton anthro asgore_dreemurr beard blonde_hair bone boss_monster_(undertale) bovid caprine duo facial_hair flower hair horn long_ears male male/male mammal mature_anthro mature_male notsoclosetnerd plant sans_(undertale) size_difference skeleton spanish_text text translated undead undertale undertale_(series) animated_skeleton asgore_dreemurr better_version_at_source bone boss_monster_(undertale) bovid caprine flower male male/male mammal notsoclosetnerd plant sans_(undertale) size_difference skeleton spanish_text text translated undead undertale undertale_(series) 2016 3:2 alphys animal_humanoid animated_skeleton anthro asgore_dreemurr beard blonde_hair bone boss_monster_(undertale) bovid caprine clothing computer electronics facial_hair female fish fish_humanoid group hair hone horn humanoid lizard male mammal marine marine_humanoid open_mouth papyrus_(undertale) reptile sans_(undertale) scalie simple_background sitting skeleton toriel undead undertale undertale_(series) undyne white_background 4:3 animated_skeleton anthro blush bodily_fluids bone boss_monster_(undertale) bovid caprine drunk english_text eye_patch eyewear female fish food group humanoid male mammal marine open_mouth papyrus_(undertale) pizza sans_(undertale) skeleton sound_effects substance_intoxication sweat text throwing toriel undead undertale undertale_(series) undyne what yukaran_nosuke 2016 5_eyes accessory alphys alternative_fashion ambiguous_gender android animal_humanoid animated_skeleton annoying_dog_(undertale) anthro arachnid arachnid_humanoid armless arthropod arthropod_humanoid asgore_dreemurr asriel_dreemurr beverage black_hair bone boss_monster_(undertale) bovid bow_(feature) bow_accessory bow_ribbon brown_hair canid canine canis caprine child clothing crown dessert domestic_dog doughnut english_text eye_patch eyewear facial_hair female fish fish_humanoid food frisk_(undertale) fur ghost glasses glistening goat group hair hair_accessory hair_bow hair_ribbon hat headgear headwear heart_symbol hi_res horn human humanoid j-fashion large_group lizard long_ears long_hair machine male mammal marine marine_humanoid mature_anthro mature_female mature_male mettaton mettaton_ex monster_kid muffet multi_eye napstablook ouji_(fashion) papyrus_(undertale) pastry pokey_(pixiv) ponytail red_eyes reptile ribbons robe robot sans_(undertale) scalie short_hair skeleton spider_humanoid spirit tea tem temmie_(undertale) text toriel twin_bows twin_hair_bows undead undertale undertale_(series) undyne white_body white_fur young young_ambiguous young_anthro young_female young_human young_male 2016 animated_skeleton anthro armor black_hair blue_eyes bone brown_body brown_fur brown_hair chara_(undertale) clothing elemental_creature english_text female fish flora_fauna flower flowey_the_flower fur gaster_blaster glowing glowing_eyes group hair heart_symbol hi_res human knife long_hair machine magic_eye male mammal marine melee_weapon mettaton_neo monster plant pokey_(pixiv) polearm ponytail purple_eyes purple_hair red_eyes red_hair robot sans_(undertale) short_hair shoulder_pads skeleton smile spear spikes teeth text undead undertale undertale_(series) undyne undyne_the_undying weapon 2016 alphys animated_skeleton anthro atlas-white bedding blanket blue_body blue_scales blush bone book brown_hair buckteeth clothed clothing comic container cup dialogue digital_media_(artwork) duo duo_focus ear_fins electronics ellipsis english_text exclamation_point eye_patch eyes_closed eyewear female fin fish frisk_(undertale) glasses group hair hi_res human humanoid humor long_image lying machine male mammal marine mettaton microphone monster nervous open_mouth papyrus_(undertale) pillow ponytail question_mark red_hair robot sad sans_(undertale) scales scalie scar sharp_teeth shocked signature sitting skeleton sleeping smile speech_bubble tall_image teeth text undead undertale undertale_(series) undyne alphys animated_skeleton asgore_dreemurr better_version_at_source bone boss_monster_(undertale) bovid caprine female fish flowey_the_flower ghost human kuphi male male/female mammal marine napstablook nuzzling reptile sans_(undertale) scalie skeleton spirit toriel undead undertale undertale_(series) undyne 1other 3girls 4boys alphys androgynous asgore_dreemurr beard blush book brown_hair cape commentary_request facial_hair frisk_(undertale) furry heart horns lab_coat mettaton mettaton_(box) multiple_boys multiple_girls papyrus_(undertale) partial_commentary renoa_yu sans_(undertale) shirt smile toriel undertale undyne 2015 alien alphys animated_skeleton better_version_at_source bone boss_monster_(undertale) bovid caprine chi-chi_(dragon_ball) crossover dragon_ball dragon_ball_z female fish goku human humanoid krillin lizard male mammal marine natouu reptile saiyan sans_(undertale) scalie skeleton toriel undead undertale undertale_(series) undyne 2015 alien alphys animated_skeleton bone boss_monster_(undertale) bovid caprine chi-chi_(dragon_ball) comic crossover dende dragon_ball dragon_ball_z female fish goku group human humanoid krillin male mammal marine natouu saiyan sans_(undertale) skeleton toriel undead undertale undertale_(series) undyne 2015 angry animated_skeleton bee_(bee_and_puppycat) bee_and_puppycat better_version_at_source beverage bone canid canine canis cartoon_hangover crossover domestic_cat domestic_dog felid feline felis female group humanoid hybrid male mammal natouu not_furry_focus papyrus_(undertale) puppycat relaxing sans_(undertale) skeleton undead undertale undertale_(series) alcohol anthro beverage blush bone boss_monster_(undertale) bovid caprine clothed clothing drunk duo eyes_closed female food fur holding_object mammal pizza sans_(undertale) sintastein skeleton substance_intoxication toriel undertale undertale_(series) wine alternate_universe ambiguous_gender animated_skeleton asgore_dreemurr asriel_dreemurr beard bone boss_monster_(undertale) bovid caprine chara_(undertale) clothed clothing comic elemental_creature english_text facial_hair flora_fauna frisk_(undertale) ghost goat group gunmouth hi_res horn human long_ears male mammal mountain napstablook plant sans_(undertale) skeleton spirit text undead undertale undertale_(series) 1:1 alternate_universe animated_skeleton better_version_at_source blush bone cigarette clothing duo english_text hi_res humanoid male not_furry outerswap outertale papyrus_(undertale) sans_(undertale) skeleton smoking star_eyes text undead undertale undertale_(series) unknown_artist alternate_universe animated_skeleton blush bone clothing comic dialogue english_text hi_res humanoid male not_furry outerswap outertale papyrus_(undertale) sans_(undertale) skeleton star_eyes text undead undertale undertale_(series) unknown_artist url alternate_universe animated_skeleton blush bone clothing comic dialogue english_text heart_symbol hi_res humanoid kissing male night not_furry outerswap outertale papyrus_(undertale) sans_(undertale) skeleton sky star star_eyes starry_sky text undead undertale undertale_(series) unknown_artist 2016 absurd_res animal_humanoid animated_skeleton atlas-white bedding blanket blue_body blue_eyes blue_scales bone book clothed clothing comic dialogue digital_media_(artwork) duo_focus ellipsis english_text exclamation_point eye_patch eyes_closed eyewear female fish fish_humanoid glowing glowing_eyes group hair hi_res humanoid long_image lying male marine marine_humanoid monster nervous open_mouth papyrus_(undertale) pillow question_mark red_hair sad sans_(undertale) scales scar signature sitting skeleton smile speech_bubble tall_image teeth text undead undertale undertale_(series) undyne 4:5 blood bodily_fluids flowey_the_flower frisk_(undertale) group human mammal not_furry sans_(undertale) trio undertale undertale_(series) 2016 alternate_universe animated_skeleton better_version_at_source blush bone clothed clothing echo_flower flower hand_holding humanoid kissing male not_furry papyrus_(undertale) plant river sans_(undertale) skeleton undead underswap undertale undertale_(series) unknown_artist 2016 absurd_res ambiguous_gender animated_skeleton bodily_fluids bone building car chara_(undertale) clothing comic dialogue ellipsis eyes_closed frisk_(undertale) hi_res house human humanoid male mammal not_furry plant red_eyes sans_(undertale) skeleton snow sweat sweatdrop tc-96 text tree undead undertale undertale_(series) vehicle 2016 animated_skeleton anthro asriel_dreemurr blue_body blue_skin bone boss_monster_(undertale) bovid caprine cartoon_network clothing comic crossover dialogue english_text female fur goat group hair hi_res humanoid katelynntheg male mammal papyrus_(undertale) parody red_hair sans_(undertale) skeleton steven_universe teeth text undead undertale undertale_(series) undine undyne white_body white_fur yellow_teeth young 1boy bad_id bad_twitter_id coat commentary english_commentary english_text glowing glowing_eye grin highres inactive_account male_focus monochrome oxi_(oxidization) sans_(undertale) simple_background skeleton sketch smile solo spot_color undertale white_background 1boy aqua_theme bad_id bad_twitter_id blue_theme coat commentary english_commentary english_text gasterblaster glowing glowing_eye grin hand_in_pocket highres inactive_account male_focus monochrome oxi_(oxidization) sans_(undertale) simple_background skeleton sketch smile spot_color tongue tongue_out undertale white_background 1boy bad_id bad_twitter_id coat commentary english_commentary english_text glowing glowing_eye greyscale grin highres inactive_account looking_back male_focus monochrome oxi_(oxidization) sans_(undertale) simple_background skeleton sketch smile solo spot_color undertale white_background ... 1boy bad_id bad_twitter_id coat commentary crying english_commentary false_smile greyscale grin highres inactive_account male_focus monochrome oxi_(oxidization) photo_(object) sans_(undertale) shoes shorts simple_background sitting skeleton sketch smile solo spoilers spoken_ellipsis tears undertale white_background 1boy bad_id bad_twitter_id bone coat commentary english_commentary english_text gasterblaster grin hands_in_pockets highres inactive_account looking_back oxi_(oxidization) sans_(undertale) skeleton smile spoilers transparent_background undertale abuse alphys asgore_dreemurr asriel_dreemurr balls barefoot bdsm blush bodily_fluids bondage bone bound bovid breasts caprine colored_pencil creepy crying cum cum_inside cumshot dildo double_penetration ejaculation erection facial_hair family feet fellatio forced furniture gang_rape gangbang genital_fluids genitals goat group group_sex horn humiliation incest_(lore) internal lizard mammal masturbation mind_control moan moobs nipples nude oral orgasm penetration penile penis pussy rape reptile sans_(undertale) satire scalie sex sex_toy skeleton smile stool strapon tears toriel torture traditional_media_(artwork) undertale undertale_(series) whipping xandermartin98 young 16:9 5_eyes alphys amalgamate animated_skeleton anthro asgore_dreemurr asriel_dreemurr bone boss_monster_(undertale) bovid caprine chara_(undertale) clothing coat endogeny eyewear fight fire fish frisk_(undertale) fur glasses goat group hair hallway heart_symbol horn human humanoid lab_coat lemon_bread magic mammal marine melee_weapon memoryhead mettaton mettaton_ex muffet multi_eye papyrus_(undertale) pdubbsquared reaper_bird red_hair sans_(undertale) sharp_teeth skeleton snowdrake's_mother teeth topwear toriel undead undertale undertale_(series) undyne weapon white_body white_fur widescreen