Mini Toy SpongeBob is a toy that only appears in the episode "Bummer Vacation."
It looks exactly like the Toy SpongeBob, but smaller.
He appears in the episode "Bummer Vacation" when SpongeBob is trying to find a way to get his mind off the Krusty Krab during his vacation. He then finds his Krusty Krab Playset, which contains a Toy SpongeBob, Toy Patrick, Toy Squidward, and Toy Mr. Krabs. However, the toys just get him back to thinking about the Krusty Krab, as evidenced when he reenacts the scene earlier in the episode where Mr. Krabs tells SpongeBob to stop visiting the restaurant and just enjoy his vacation with the toys.
After that, he decides to make his Toy SpongeBob play with this toy along with the mini version of Toy Squidward
, which still still makes think about the Krusty Krab, much to his exhaustion.