Exeggution is an eccentric, frolicsome, skillful, cunning, dexterous, intelligent, knowledgeable, and imaginative Psymonster who wants to help any Psymonsters and solve problems, but he can sometimes crave nothing but chaos, mischief, magic, deceit, confusion, and pandemonium. Because Exeggution has a very perplexing, questionable, and mild-mannered personality, he tries to influence other Psymonsters in an extremely clever and unscrupulous way. As a result, everything good that Exeggution tries to do ends up at least a little bit bad, and everything bad comes out a little bit good. According to the other Psymonsters, it actually makes him a pretty thoughtful and sympathetic friend, if any Psymonsters doesn't mind all of the argumentative discussions.
He is a big white egg with yellow eyes, black eyebrows, a mustache, a beard, and a black bowler hat with a red band, purple gloves, a navy bow tie, blue clothing with sky blue stripes, and orange shoes.
- His name is a combination of "egg" and "execution".
- Like Icecrusher, Exeggution wears purple gloves.