Jim is a green very strong and very buff fish. He has a purple headband. He has a white wrestle t-shirt. He is not the same as Jim, the fry cook. He was at the wrestling match with the Purple Wrestler.
Jim makes his biggest appearance to date in this episode. He teams up with the Purple Wrestler to defeat anyone that has come in their way. However, Jim and his partner were defeated by SpongeBob and Patrick when Jim and the Purple Wrestler used their Tag Team finisher right onto Patrick's iron butts. He and the Purple Wrestler crumble up finally being defeated for the first time.
Hello Bikini Bottom!
Jim returns with the Purple Wrestler in this episode. Most likely retired from being wrestlers, Jim and the Purple Wrestler work now as Colonel Carper's roadies doing everything he said. They help him take back his sound equipment from Mr. Krabs and even shake the money off of Mr. Krabs into Carper's pants. They weren't seen again after that.
Even though he appears in three episodes, Jim actually only has a few lines from "Krusty Krushers" saying "Uh oh" before diving onto Patrick's iron butt.