SpongeBob The Bat Sponge: A Parody of Batman

When supervillains threaten to destroy Bikini Bottom, SpongeBob must become the superhero The Bat Sponge to save the day, even though it ultimately requires him to sacrifice himself for the greater good. Following SpongeBob's heroic sacrifice, his successor SpongeBoy must become the new Bat Sponge to save the world and universe from destruction. Available as a YouTube audiobook.