go to sunyshore city use surf on the route make sure you beat volkner any way use surf on the route keep going strate and use waterfall on the waterfall you will see a cave entrance go threw cave and use waterfall theres the POKEMON LEAGE
After beating Sunnyshore gym use surf on the water north of the Pokemart. You will see a big waterfall. If you didn't teach or find the HM Waterfall, teach it to one of your Pokemon now. Heal your Pokemon, then go through Victory Road. It's a long way! You will see a big castle, and that's the Elite Four league!
In Pokemon league
jynx ..
no
go to the Pokemon league
no
they are in the Pokemon league.
use the move nuclearbomb
Pokemon league.
at the city of the Pokemon league
No. You need to beat the Pokemon League IN the Platinum one.
You can't really go further then that. The pokemon league contains the toughest trainers in pokemon platinum.
7 days. XD