Mr. Meeseeks

 is a non-playable character in MultiVersus.

Context
Mr. Meeseeks is a blue humanoid creature summoned by an item called the Meeseeks Box. Each Mr. Meeseeks is designed to fulfill a single simple task before disappearing, and they will go to any lengths to complete said task as existing itself causes them great pain.

Role in MultiVersus
Several Meeseeks appear as training dummies in several of the game's tutorial segments. Some of them can be seen wearing Rick's grappling shoes to fly in the air.

They can also be spawned from the Meeseeks Box item to attack enemies.