You need to evolve a Ralts at level 20, and then evolve that Kirlia to level 30. You can find them on the northeren section of Route 212. Serebii.com is a good website for these sort of questions.
you can't find a gardevior in the wild
The first Psychic you'll encounter has one.
you have to get a ralts and level it up to 30. the first evolution is kirlia (at level 20)
yes. go to victory road and cross the bridge, you go to the right, use rock climb (down), then go to the left and there will be a trainer. he has a haunter, a gengar, then a gardevior. hope that helped
You can not find a Gardevior on Emerald. You will have to find a Ralts in route 102 then evolve it into Kirlia at Level 20. Then into a Gardevior at level 30.
buy the Pokemon platinum book
The 151st Pokemon is Mew and is unobtainable in Pokemon Platinum.
Lopunny, Gardevior, and Medicham (i think gardevior should get together with team raider's gallade)
no you can't find a torchic egg in Pokemon platinum
try your best to find spirtomb in Pokemon platinum
There is not a route 233 on Pokemon platinum.
You cannot find zekrom in pokemon platinum