Help beating my older brother at pokemon?

well in my pokemon diamond i have all level.100 pokemon and they are all lengendary they are giratina with draco meteor,earth power,shadow force,and fly.mew has blizzard,solar beam,sunny day,and transform.raquaza has blizzard,ice beam,dragon pulse,and dragon claw.arceus has judgement,earth power,and i don't remeber the rest of the moves of arceus.so my suicune has ice beam,auora beam,hydro pump,and blizzard.lastly but also not leastly lugia has sky attack,hydro pump,phycho boost,and last aero blast so you should be thinking of buying an action replay or using the gts my team is so powerfulit can beat your brothers team easy!