Just like the title asks..I know it's a really stupid question but I was just curious if this was possible.

I do not beleive it is possible, but why would you want to, other than Cresendo?

No you can not place heartless on your own world.

Because playing crappy low-level heartless (soldier, Bouncywild, etc.) on your own worlds means your opponent can't play any good ones on your worlds, which would break WR pretty quick.

Daisuke_Aurora said:

i never thought of it that way til now.