How many characters are in Super Smash Bros Brawl

There are 35 total playable characters, but there is also other characters too that can't be unlocked but can be used in battle if you follow these steps.
1. Zero Suit Samus: Can be used if you use Samus's Final Smash (Zero Laser)
2. Shiek: Can be used when you are Zelda. Press the Down button & the B button at the same time to transform into Shiek. Trasofm back by doing the same
3. Switch Pok'emon: Press the Down button & the B button at the same time to cycle through the different pok'emon while using pok'emon trainer. You automatically use a different pok'emon if you fall off the stage.
35 or its 36. There are 35 characters in all.