Harder than PKMN Colosseum.

I'm having a very hard time beating this game,it is so much harder than PKMN Colosseum!The shadow lugia is getting to be a nuisance to even look at!He looks cool but I wish I could purify it.I know how to,but I can't pull it off.You have to get perfect tempo in all nine purifing chambers,and I don't have enough pokemon,and their tempo is't high enough,I hope the info helps someone that doesn't know how to purify the shadow lugia,and I hope you comment me.Bye.