Jim Cook, also known as Jim "Crocodile" Cook, is an ally of Jaden Yuki and a main protagonist starting with his debut in Season 20. Jim is recruited by Jesse Anderson to help fight against the Akatsuki. Jim is later forced to wait on Earth during the final battle against Samus Aran.
- Jim Crocodile Cook is the only one of the 3 Overseas Champions that wasn't referenced in some way before his debut, which is a reference to the fact that he didn't reappear in Season 4 of Yu-Gi-Oh! GX like Axel Brodie and Jesse Anderson did.
- In Yu-Gi-Oh! GX, Jim has a crocodile named Shirley, but for some reason, she isn't with him in Super Smash Bros. Crossover.