Creamu final boss
You need to get 30,000 GBATEMP XP to be at a high enough level to fight Creamu. And purchase a EMF Emiting device to even damage him.
Strategy:
Best place to grind XP is in the politics section. The toughest place to be but you gain lots of XP from lots of enemies that randomly appear there. It has high encounter rate. Great for XP grinding.
To beat Creamu start off into the fight by throwing a emf emitting device at him. Then you must destroy his outer EMF protection cloth layer.
Once creamu true form is exposed start pummeling him with emf.
There is a time limit. Creamu is trying to be moderator so you must win the fight before he becomes one or you loose. Once creamu becomes moderator its game over for you.