How do you get & keep the Black Poppit in LBP?

Well, I was playing LBP with my cousin when all of a sudden, he came out of the Spawn Checkpoint with a Black Poppit. This made us wonder. What did he do to get it %26amp; how do you get it?|||You have to go through simple glitch that has to do with 2 controllers in LBP (Google or Yahoo it), but you cannot keep the black popit.