A single six-sided die of randomly chosen color and style, with an engraved word balloon containing the word "DAMN!" inked in white in place of the "1" side pips. The ink for the other sides may be in a different color.
You don't need to catch them all, just certain ones, but those ones you REALLY need to catch. Or someone else will catch the ones they need and then the game will be over. Plus, think of those poor pokemon, stuck in a maze, all alone. Just dreadful.