It would often XANA in trying to steal Aelita's memories and once stole Umi's way of returning to Earth. After XANA's success in one of it's plans, the Scyphozoa was stealing Aelita's key to Lyoco and destroyed it from the inside until Aelita and Jeremie rebuilt it.
Later on, the Scyphozoa was seen rewriting Willaim Dubar's Memories into being XANA's General, it would make a few more appearances after this as it would try to destroy the Lyoko Warriors' ship.
Powers and Abilities
The Scyphozoa is able to steal parts of code from the Lyoko Warriors, so that it could braimwash them or cake something from them.
Grim Adventures of Billy & Mandy