it spits out a wintermelon and a zombie wearing a bucket. 

I feed the mimic a miracle berry (miracle berries cause everything you eat for the next half hour to taste incredibly sweet. yes they are real). then i feed it an onion.

The mimic spits out a miracle berry and an onion.

I feed the mimic a zoroark.

It spits out a Hisuian Zororark.

i feed it a Grimmsnarl.

it spits out Haterrene 

I feed it Naclstack (My second favorite pokemon behind squirtle)

It spits out a Toedscruel.

i feed it a Gengar.

the Gengar escapes and sends you to H E double hockey sticks

I throw a pokeball at it

It spits out a Gimmighoul.

i feed it a Gimmighoul.

It sees Gimmighoul as a fellow mimic and is outraged you would force it to canabalize, it eats you

I feed it TheFriendlyArchfey

It spits out TheFriendlyArchfey, and eats you. TheFriendlyArchfey is a friend of all shapeshifters.

i feed it Stertle09.

Stertle09 is angry and summons the wrath of the ALMIGHTY TURTLE to smite thee down. 

I feed the mimic it's tounge

It spits out their own tongue, which grows into a new mimic and eats you.

i feed the Mimic a Map mimic.

The mimic gets its tongue bitten by the map mimic. the map mimic and the mimic proceed to eat you.

I feed the mimic the strange tentacle person from the Jealousy(II) chapter of the mimic (roblox).

The mimic gives you a spell scroll of wish

I feed the mimic myself

It spits you out because you're not very tasty

I feed the mimic a cheese toastie

It spits at you a druidic focus staff that replaces any spell cast from it with a shot of vomit.

I feed the mimic a pair of swimming goggles.

It spits out a swimming pool. Don't ask how.

I feed the mimic phytoplankton

It spits out zooplankton.

i feed it Fugu.

It spits out a carrot

I Feed it A lock Of Hair From My Elf Ranger Buddy

It spits out the rest of your elf ranger buddy

I feed it a slice of pizza