first you need to use a kind of repel when you are in the grass by canvalave city and use pokeradar (you need the national pokedwx and talk to rowen and he will give pokeradar) and do it until you find it
in mt cornet
There is a 1 in 1861 chance that you will find a shiny Pokemon in the wild. They are just found at random in the wild. There is no specific place.
You can't catch Ivysaur in the wild in Pokemon Platinum. But you can mirage it into the Pal Park from the older GBA games into the DS.
go to pokemonmarriland.com and it will have all the info you need
Turtwig and Chimchar are starters in Pokemon Diamond, Pearl, and Platinum. You can choose either one of them, or Piplup, when you first start the game, but to get both, you would need to trade with another player or leave them in the daycare with a Ditto.
next to canalave city
you can find a wild kirlia in the Pokemon mansion area but not in the Pokemon mansion
you can't find a gardevior in the wild
In the woods.
in mt cornet
Nope only in trade or starter Pokemon
Ditto is a genderless Normal type Pokemon from the first generation. In Pokemon Leaf Green, it can be found in the wild on Routes 13, 14, and 15, at the Pokemon Mansion, or in Cerulean Cave.
Trade from Emerald/FireRed/LeafGreen. Ditto is not found in Sapphire go to fortree city when you find a wild absol teach it blizard go back to the grass and use a max repel the only Pokemon you will find is a ditto
in or on top of mt coronet
there are none in the wild you have to breed Bannette
A Buizel can be found in the wild grass at Valley Windworks.
you cant evolve a wild Pokemon in Pokemon platinum you either have to catch the wild Pokemon and then evolve him/her or kill the wild Pokemon.