Whether you know it or not, there are about 13 hidden characters in Super Smash Brawl and they are Ness, Marth, Luigi, Falco, Captain Falco, Luciaro, Snake, R.O.B., Ganodorf, Mr Game & Watch, Sonic, Jigglypuff, Toon Link and Wolf. At the same time, you will need to complete certain tasks to unlock these creatures. However, I am going to leak some ideas on how you can unlock Luigi, Falco, Sonic and Wolf.
It is very easy to unlock Luigi. All you need to do is to complete the classic mode on Easy. That will unlock Luigi and so you can move on to the next task. If you want to unlock Falco, you will have to complete the 100-man brawl. While this sounds rather difficult but it is really easy if you have been playing Super Smash Brawl for some time.
Sonic on the other hand can be unlocked if you complete the adventure mode. This is rather interesting. You can unlock Wolf by completing the adventure mode and the bosse battle mode using Fox. This is perhaps the highest level to unlock a character and that is why it might be extremely challenging for some of you.
Super Smash Brawl is indeed a very interesting game to play on Wii. With 41 levels, one story mode and events to keep you in battle for a very long time, how can you be bored with it?