When SpongeBob is dared by Kevin C. Cucumber to punch himself in the face, he does so out of his fan obsession. When Kevin asks if that hurt, SpongeBob takes out a metal glove with spikes and asks if he wants it to.
Tales From Bikini Bottom
It is seen in the "I'm Your Biggest Fanatic" segment of the book, where it has the same role he has in the episode.
The SpongeBob SquarePants Movie video game
It is used as part of SpongeBob's bash move to press buttons and platforms in midair, and break the floating boxes as well as the floating enemies. Upgrading it transitions it into the metal glove with spiked knuckles and thus gives faster results.