How do you get treecko in Pokemon Platinum?

Note: You must be able to go to Pal Park. You nee to have Pokemon Sapphire/Ruby/Emerald, and choose Treeko as your starter Pokémon. Then, you put it into a BOX in Lanette's PC. Then, save your game and turn it off. Then load your Pokemon Platinum. Dont start the game, click: Migrate from Sapphire/Ruby/Emerald. Click that. Choose the Pokémon(s) you want to Migrate. Click Done and load the game. Go to Pal Park, and talk to the man at the counter.

Hope I Helped!