Dude, ong its pretty annoying when good yet small mods like this dont have litteraly ANY info on it. at the very least this one has their discord,

but anyway here's the full list of Pets and how to get them lol
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Spamton: obtained Via crafting deal maker, using Goggles, Amethyst and Topaz at any work bench

Red crewmate: Obtained via crafting Suspicious Looking Crewmate using 3 Meteorite Bars, Ruby, Lens at any anvil

Neco Arc: Obtained via crafting Pilk, using Carton of milk, Cream soda/Joja cola at any bottle

Clippy: Obtained via Suspicous Looking document. using 10 Bamboo, Black ink at any Demon alter

Marisa: Obtained via crafting Mini-Hakkero, using 8 of any wood, hellstone bar at any workbench

Reimu: Obtained via Purification Stick, using Wand of sparking, 2 Silk at any workbench

Papyrus: Obtained via Spaghetti, said item being a 1% drop from undead vikings/Armored Vikings

Sans: Obtained via Ketchup, same as papyrus, being a 1% drop from armored/Undead vikings

Sunny: Obtained via Shiny Knife, being a .5% drop from bunnies

Metal Gear Rex: Obtained via PAL Key, being a 5% drop from Mice

Dart Monkey: Obtained via Bundle-o-Bananas, being a 1.43% drop from windy balloons

talking Flower: Obtained via Nature's Punishment, being gotten by throwing a Nature's Gift into lava

The Knight: Obtained via Old Nail, using iron/lead ore at any anvil. Light variant uses Faeling in a Bottle

Isaac: Obtained via D6, being a .4% drop from mostly any zombie variant

Shovel Knight: Obtained via Shovel Blade by throwing a Gravedigger's Shovel into shimmer.

Yukari's: obtained via Ukari's Umbrella by throwing an Umbrella into Shimmer

Hornet: Obtained via Needle, being a 2% drop from Wall Creepers and Black recluses

Mimikyu: Obtained via Pokeball, being a 10% drop from any NORMAL mimic variant

Eevee: Obtained via Pokeball, Being sold by the merchant for 50 gold after EOC has been slain

Mew: Obtained via Cherish ball, being a .04% drop from any non-critter enemy (dont think bosses count, idk they never specified)

Niko: Obtained via The Sun by throwing Star in a bottle into Shimmer

Yes Man: Obtained via Platinum Chip, being found in any locked dungeon chest or Golden lock boxes

Dogmeat: Obtained Via Stolen Cryolator, being found in any locked dungeon chest or golden lock boxes

Toad: Obtained via Super mushroom, being a 50% chance to be found in any mushroom biome chest

Pomni: Obtained via Exit Door, by throwing an Iron door into shimmer

Molly: Obtained via M.U.L>e Calling Rod, being a 5% drop from Undead miners

Basil: Obtained via Flower Crown by throwing a Jungle Rose into shimmer

Pochita: Obtained via Super Toast, being a 2.5% drop from Demons (never specified if VooDoo doll demons count)

Flowey: Obtained via Friendly Looking Flower, being a 5% drop from any Angry Dandelion

Cirno: Obtained via Fallen Icicle, being a 2% drop from spiked ice slimes or Ice elementals

Slugcat: Obtained via Vulture mask, being a 1% drop from Vultures

Little Chocobo: obtained via Gysahl Green, being a 1% drop when breaking any jungle plant

Meat Boy: Obtained via Suspicious Looking Saw, Being a .4% drop from Blood crawlers, Crimera, Blood Feeders, Blood jellies, Herplings and Crimslimes

Geometry dash cube: obtained via Geometry Dash cube, by throwing Companion cube into shimmer

Spamton NEO: Obtained via LoadedDisk, using Dealmaker, 5 Iron/Lead bars, 15 wire at any anvil

Jevil: Obtained via Cell key, by combining three cell key pieces, Piece A is bought from the Clothier for 20 gold, Piece B is found in sky chests (never clarified their % chance) and Piece C is found in overworld wooden chests, (once again, no % chance given.). both Key Piece B and C are exclusive, with their only being one per world, yet both can be found in their respective fishing crates.

Puss in Boots: Obtained via Cat Sized Boots, using 5 leather at any workbench

Pikachu: Obtained via Pokeball, being sold by the merchant for 50 gold after EOC has been slain

Dimentio: Obtained Via Chaos heart, using Life Crystal, 4 obsidian at any Demon altar

Uzi: Obtained via Sick as Hell Railgun, being found in any Locked dungeon chest or Golden lock box

Sonic: obtained via Sonic's Shoes by throwing Old Shoe into shimmer

Super sonic: obtained via Chaos emeralds, using 5 Amythst, 5 Topaz, 5 Sapphires, 5 emeralds
5 Rubies 5 Amber 5 Diamonds and sonic's shoes, No crafting source was specified so im assuming its crafted via hand (or generally whenever)?

Sonic The Werehog: obtained via Negative Chaos emerald, using Chaos Emeralds, 5 Souls of night (same as super sonic, no specified crafting source)

Tails: Obtained via Miles Electric, being sold by the mechanic for 30 gold

Knuckles: Obtained Via Master emerald, using Large emerald, 3 mana crystals at any anvil

The lamb: Obtained via red crown, being found in any locked dungeon chest or lock box

Bullet kin: obtained via Magnum, being sold by the arms dealer for 30 Gold

Noob: Obtained via Robux, by throwing a platinum coin into lava

Captain toad: Obtained via Toad Brigade supplies, using Super mushroom, iron/lead pick-axe, mining helmet at any anvil

Helpy: Obtained via Lawsuit, Using Book, Black ink, Feather at a table and chair

Dallas: Obtained via duffle bag, using 5 silk, 20 gold at any workshop

Murkrow: obtained via Dusk ball, being a .4% drop from Eater of souls, Devourers, Corruptors, Corrupt slimes, slimers and world feeders

Azazel: Obtained via Brimestone, being a 1% drop from Fire imps

i created the wiki just for u also all the information was in the discord.