Those jet packs and ray guns may be toys, but these "masked intruders" are anything but fun and games when they come barreling your way.
They'll sometimes chuck grenades your way, but that's not necessarily bad news. After letting it fly, they'll hit the deck. Kick 'em while they're down! Or, if you're feeling fancy, a well-timed Keyblade swing will return those grenades to sender.