You go to the lake near your character's home town (Where is Mesprit) and you will see the professor and your girlfriend battling. You help them and you go to the lake where is Uxie. You beat them all then beat the gym leader. Then you go to the Spear Pillar and catch Palka/Diagla/Girratina.
Read more: http://wiki.answers.com/What_do_you_do_after_beating_commander_Saturn_in_Pokemon#ixzz16YMhObWz
No. You need to beat the Pokemon League IN the Platinum one.
nothing
On Pokèmon Platinum, you get the Dowsing Machine after you beat the Sinnoh Pokèdex, when you talk to the Professor.
well i have beat them in Pokemon diamond and u have to gust cheap on trying to beat them
you beat the elite four
Saturn
No. You need to beat the Pokemon League IN the Platinum one.
yes you do have to beat Saturn in order to get uxie mersprit and azelf out.
beat the game LOSERS YOU NEED TO GET A LIFE
Tristin F. was the first person in America to beat Pokemon platinum. She beat it on Nov. 7, 2009.
Well, if you want to beat Pokemon platinum, you would have to go to a website that has walkthrough cheats...
After you beat Commander Saturn and help your rival you fly to Velistone city and free the three legendary Pokemon. Then after that you go to Mt. Corenet and go to Spear Pillar.
nothing
by knocking out all his/her Pokemon
You try and beat the 4 th gym
Go beat the fourth
You do it