Mermaid Man is a spriteswap of TheIranSonic & Sonicadam2's first Gumball Watterson. The character's moveset, like the base character it was swapped from, is very limited, having only three Hypers, most of which are incredibly generic (such as a Shun Goku Satsu); furthermore, the hitboxes from the base character were unchanged, meaning that many of Mermaid Man's Normals don't connect with the opponent.
Like the base character, Mermaid Man doesn't have an A.I, making it an easy opponent. However, take note of the messed up hitboxes, as they may cause it to be hard to hit.