If you happen to have an R4I card with pokemon platinum on it, then go on GAME, and scroll down until you see POKEMON PLATINUM. But don't go on it! Press B or X until you go on CHEATS. Then, scroll down until you see a cheat called GHOST MODE. Tick it, then go onto the game. Your trainer will not walk or run as it will float when you move. try walking into a wall. You will go through it! This will work with trees and solid objects including other trainers! if this dosen't work, then...I don't know. however, good luck!