Here are the list of Super Smash Bros Brawl characters:

1. Diddy Kong (from Donkey Kong Country)
2. Ike (from Fire Emblem)
3. King Dedede (from Kirby)
4. Lucario (from Pokemon)
5. Lucas (from Mother 3/EarthBound 2)
6. Meta Knight (from Kirby)
7. Pikmin & Olimar
8. Pit (from Kid Icarus)
9. Pokemon Trainer (controls 3 Pokemon you switch between Squirtle Ivysaur and Charizard to fight)
10. R.O.B. (Robotic Operating Buddy — from Gyromite & Stack-Up)
11. Solid Snake (from Metal Gear Solid)
12. Sonic the Hedgehog
13. Wario
14. Wolf (from Star Fox)
15. Bowser (from Mario)
16. Captain Falcon (from F-Zero)
17. Donkey Kong
18. Falco Lombardi (from Star Fox)
19. Fox McCloud (from Star Fox)
20. Ganondorf (from The Legend of Zelda)
21. Ice Climbers
22. Jigglypuff (from Pokemon)
23. Kirby
24. Link (from The Legend of Zelda)
25. Luigi (from Mario)
26. Mario
27. Marth (from Fire Emblem)
28. Mr. Game & Watch (from classic Game & Watch games)
29. Ness (from EarthBound)
30. Pikachu (from Pokemon)
31. Princess Peach (from Mario)
32. Princess Zelda (and her Sheik transformation after using the down special move)
33. Samus Aran (and her Zero Suit Samus transformation after using Final Smash — from Metroid)
34. Toon Link (from The Legend of Zelda: Wind Waker)
35. Yoshi (from Mario).

What's your favorite Super Smash Bros Brawl fighting character?
I like so many of them. I can't name one who is my favorite!