Along with Soul Silver, I've also taken the time to finish up anything unbeaten in my SSBB game.

I already:

-Unlocked all characters/stages beat the adventure mode
-Cleared about 80% of the challanges
-Got over 400 diferent trophies and over 400 different stickers
-Have almost all CDs

The only thing really keft is beating All-Star mode and 100-man brawlwith all characters and Boss Battles, too.

There is a challange that requires me to beat Boss Battles on Intense difficulty.
That one is the kind that makes me throw the wiimote at the tv screen...