This tier list is well, terrible.
S tier is good, but A+ tier is where the problems start. Sheik should be in B tier while Marth should be at the top of this tier, and lloyd and dk should be here.
A shouldn't have Ness, it should have Chibi-Robo and Link.
B+ should have Mario and Bandana Dee instead of Peach and Zelda.
B has a ton of problems, PAC-MAN and Zero Suit should be near the bottom of this list, and I've talked about the rest of this tier.
C+ has a few problems, Black Mage should be lower, while Sora should be higher.
C is really bad, Yoshi should be in B+ while Luigi and Pit should be in bottom tier.
C- is actually fine except for Lloyd. Why in the world is lloyd in low tier? He is a character that is universally considered a top 5 char.
D+ is bad, Mega Man and Bomberman are B+, while Chibi-Robo is an top 10 char.
D is fine, but Pit and PAC-MAN should be here right behind kirby.
E is well, bad. Luffy is the worst character, and Sandbag is a C tier character, not a bottom tier.
Here is my tier list by the way:
_________________SSF2 Mains:
:lucario:
SSF2 Secondaries: Waluigi
Ultimate Mains:
Snake Greninja
Olimar Vincent
Ultimate Secondaries: Toon Link, R.O.B. Richter, Roy, King K Rool, Lucas