Go to valor lakefront and go inside the "forest" near the house with the girl who is looking for her key. Then beat the Galactic dudes and the commandor. :)
you go in the cave in the middle of lake valor and beat the galactic camander
you go to the team galactic warehouse
Defeat that Galactic Goon!
Check a Walkthrough. I used http://www.psypokes.com/platinum/walkthrough.php
you can find a houndor in the grass part b4 valor lakefront
the Pokemon champion Cynthia gives it to you after you chase the team galactic grunt to lake valor
route 223 and in the huge field past valor lakefront
verity lakefront acuity lakefront valor lakefront
they are in the cave in the middle
Defeat that Galactic Goon!
You have to anally rape them from behind, then they will come.
Check a Walkthrough. I used http://www.psypokes.com/platinum/walkthrough.php
Valor Lakefront
in lake valor
Defeat Team Galactic on Mt. Coronet and either defeat, capture or run from Dialga (Diamond), Palkia (Pearl) or Giratina (Platinum).
After defeating Galactic Grunt, go inside the cave and read the trio figure inside the cave. Then the old lady(Cynthia's Granny) wil come and give you HM3 Surf. Now , you are ready for Hearthome GYM ...Enjoy
In the Valor Lakefront.
You'll gain/find it at Valor Lakefront.
Route 214 and Valor Lakefront hope it helped :)