In Dragon Ball: Raging Blast 2 for the PS3 and Xbox 360, you can unlock Hatchiyack as a playable character.
To unlock Hatchiyack, you just need to watch the “Dragon Ball Z – The Plan to Eradicate the Super Saiyan!” movie that is included with the game.
Check out my other guide for a full list of Dragon Ball: Raging Blast 2 unlockable characters.