you have to raise a Pokemon until it is a very high level go to mount pillar and use your best attackts
you go to the top of sky pillar on route 131
deoxes because he is very strong and can beat raquasa
sootapolis city after going to to sky pillar and once steven leaves and raquasa calms kyoge and groudon
how to beat Pokemon emerald
you beat Archie on emerald
Go outside
You celebrate!
Have to beat the elite four.
after you beat your father's gym
beat the 8th gym
beat the elite four
maybe killeng shadow