in ilex forest, but way to go to ilex forest is get hm cut..
:p
Chat with our AI personalities
U go to kanto and u sail
You must counteract it with some kind of special move
Actually, this is the same place as in SoulSilver- the Whirl Islands. You'll need to get the Silver Wing from a man in Pewter City, and then you just run in and begin the quest for the Sea Guardian Pokemon!
Continue your quest
By doing Demon slayer quest