I've been playing my favourite version of SNBM, and I've been studying how all characters have their own skills, so, I decided to give my own tier list.
S tier:
1. Fox
Fast, blaster can quickly rack up damage, two hitboxes in smash attack, great at racking up damage, aerial/jablock has great spacing, three ways of / great recovery.
2. Pika
Fast, 2nd best aerial ingame (can meteor smash), can hit above, excellent mindgames, great hitbox for smash attack, safe approaches, great spacing, three ways of recovery.
A tier:
3. Sonic
Fastest runner ingame, powerful hitbox for smash attack, 2nd best aerial ingame (can meteor smash), can hit above, four ways of recovery.
4. Kirby
Smash attack can combo, best aerial in game (can meteor smash), three ways of recovery, hammer has good hitbox.
B tier:
5. DK
Solid choice, powerful, easy landing on Giant Punch, two meteor smashes, Headbutt can aid recovery, Spinning Kong can multi spike.
6. Yoshi
Neutral attack can chain, punishing smash attack (esp. on shields), best aerial ingame, best recovery ingame, Egg Throw can help team combos.
C tier:
7. Mario
Four ways of recovery, slow attacks, predictable, decent aerial attack, can meteor smash.
8. Bowser
Poor choice, poor recovery, slow attacks (though great aerial and powerful smash attack).
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http://spamtheweb.com/ul/upload/130908/9032_SNBM_debug.php
Have objections? Show me your mov... reasons, and maybe I can put that to account to change my tier list.
THIS TIER LIST IS NOT OFFICIAL UNLESS THE ADMINS CLAIM IT TO BE!! MAKE YOUR OWN IF YOU ARE NOT SATISFIED WITH THIS ONE!!
By the ways, my mains are pretty much the S, A and B tier characters. Fox and Pika ftw!! Others [excluding C tiers](to a lesser extent) pwnage!!