Streets of Rage cheats and cheat codes for Nintendo Wii

This game another title is Bare Knuckle.

Select Level and Select Starting Lives number:
Hold down A + B + C + RIGHT at the main menu on controller TWO while
selecting "Options" on controller ONE.

Get Bad Ending
Select to be Mr X's right-hand man the first time you meet him.
Then finish the game.

Bonus continues
Go to the title screen and push Left, Left, B, B, B, C, C, C, Start.

Final Boss Duel
When you reach to the last boss fight in two player mode, have one
player select "YES" and the other select "NO". You will be forced
to duel against each other.