Actually, it is. I'd of completely stopped playin' Brawl for RDR and AC:Revelations a year 'fore my Wii broke if hacks weren't on my to do list. Simple things like texture 'n music hacks are all any game needs to keep it's senior fan base moderately interested for possibly years t' come. When whole new modes 'n an entirely different game are available via modding, the game gets longevity practically twice as long as the game would'a survived without.
I hacked my friends Wii a while back
found some textures on my computer from when I hacked it
FOUND THE MR. R TEXTURE (which does not exist on Brawl Vault anymore)