>>22298429Secret post-game boss.
Although my vote would go to Giratina, and you have to venture through the crushingly hard Distortion world first. It'd be full of Master Fortress-esque versions of the game's hardest common enemies.
Also, imagine a Boss Rush Plus mode, where the bosses now have additional strategies or attacks to counter or more easily defeat you. Think Title Defense Mode in Punch Out Wii.
