by knocking out all his/her Pokemon
kill all her pokemon.
you fight it and defeat it w/ ur Pokemon
use the move nuclearbomb
If this is your first battle with saturn, after you defeat him, head off to Lake Verity to check if everything is ok. If this is your second battle with him, when you battle him and Charon, head off to Mt. Coronet to battle Cyrus.
Once you defeat Saturn at Lake Valor, go to Lake Verity and defeat Mars.
Just get STRONG Pokemon
With a Budew.
go to the Pokemon league and defeat them
use a flying , poison or flying Pokemon
Defeat the 8th
w8 for platinum or get diff game i ges
You have to defeat all the trainers and find all the Pokemon