Maybe we should start by eliminating characters? Its way too vague to start by guessing characters this time?
2. Ike (from Fire Emblem),
4. Lucario (from Pokemon),
5. Lucas (from Mother 3/EarthBound 2),
7. Pikmin & Olimar,
8. Pit (from Kid Icarus),
9. Pokemon Trainer (controls 3 Pokemon, you switch between Squirtle, Ivysaur, and Charizard to fight),
12. Sonic the Hedgehog,
13. Wario,
Lots of veteran characters from the original N64 Smash Bros. or its Melee GameCube sequel will return, they are:
15. Bowser (from Mario),
16. Captain Falcon (from F-Zero),
17. Donkey Kong,
19. Fox McCloud (from Star Fox),
21. Ice Climbers,
22. Jigglypuff (from Pokemon),
23. Kirby,
25. Luigi (from Mario),
26. Mario,
27. Marth (from Fire Emblem),
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),
35. Yoshi (from Mario).
I copied this off of google on a SSBB character list search.
Also, Bowser's unusual tactic which requires skill is his own unique chain grab, which involves grabbing them, using the grab attack until they free themselves, and then doing a running grab into the next part of the chain. This is made possible by Bowser's ability to react before his opponent on a grab release.