I have finally been able to post this thing. In my original post I explained all my placements, but now I feel like any comments you make on it I can, and will eventually answer.
That being said...B and C tier are "flexible", as in I didn't painstakingly ponder over their every placement. They are relatively ordered and from a glance they look right to me. Top tier and bottom tier, however, are strictly ordered. Yes, I think Piranha Plant is underrated and I think Pac Man is overrated. Pikachu is not the best in the game. Looking back on this now I'd move Wolf up, maybe switch him with PT. So there you go.