This is a tool-assisted speedrun. For more information, see http://tasvideos.org/2724M.html
This version of Pokémon: Platinum Edition is a pirate game made by Sintax in 2005. It has nothing to do with Nintendo's official Platinum Version released in 2009 on the Nintendo DS.
In dekutony's first published run, watch as he abuses glitches in the game to increase the FPS and fall through walls, beating it in a brisk 2 minutes and 23.67 seconds.