There are no cheats in it...
no
no
There are no cheat codes for Super Smash Bros Brawl, normally. If you have the Homebrew Channel, get Gecko OS.
Sorry but no.
go to this link: http://www.ign.com/cheats/games/super-smash-bros-brawl-wii-748545
Super Smash Bros., Super Smash Bros. Melee, Super Smash Bros. Brawl, Super Smash Bros. for Nintendo 3DS/ Super Smash Bros. for Wii U, Super Smash Bros. Ultimate.
You can only install Super Smash Bros. Brawl on your Wii with a Super Smash Bros. Brawl disc.
You can cheat if you have the homebrew channel.
Try neoseeker.com, there are a lot there.
Just go to smashbros.com and it will tell you everything there is to know and unlock on Super Smash Bros. Brawl.
The "sequel" to Super Smash Bros. Brawl, in a way, is Super Smash Bros. for Nintendo 3DS/Super Smash Bros. for Wii U.