I think both Pit and Kirby should probably not be so high and some others like Sonic and Wolf go up a bit. For Wolf, I'm still trying to wrap my head around Wolf getting around those CG tactics.
What do people think about DK? I think he might have what it takes to go up since he has been doing well in Atlantic North, which is pretty much DK land at times, too. There are the infinities and juggling, but then again Wolf has similar issues and it's not that crippling for him.
I'm a bit late, but Wolf is actually pretty solid at running away. Camp with laser, space bairs, sit on platforms and punish their aerials OoS, jumpshine > flash cancel, etc etc. Wolf has significantly more mobility than D3 so that definitely helps. Wario lacks the grab range to land the grab against a defensive Wolf imo, and his mediocre ground speed doesn't help either. Pika I don't have enough experience against to say anything conclusive :x Poor grab range, but solid mobility, idk.
DK should really go up when you look at everything he's done. Although having significant difficulty with both MK and D3 will probably hold him back from ever getting too high up in C tier imo :/
We should do a crew battle.
Peach vs Wolf
Winning Team Is Placed Two Spots Above Opposing Character
Yes.
Wolf can say "hi" to -
Fixed. Assuming that we only say "hi" to -2 or worse MUs. inb4wario
As for opinions on the other characters you listed...
MK: I think MKs could be playing a lot of MUs better, but Wolf would still be in the top third of the cast in terms of the MK MU. Shine is really good, usmash OoS is really good, laser is really good, dsmash is really good, bair is bair, etc etc. but MKs that use Tornado and SL OoS effectively can cause some difficulty imo.
Falco: What Kain said.
ICs: What Kain said, although I tend to enjoy jumping straight into their grabs >_>
Wario: Jump around a lot, space bairs well, use platforms to your advantage, and it becomes really tough for Wario to land that grab. Our aerials and shine all beat his aerials (because of their weak range/disjoint, aside from uair which is a close call), and laser is irritating for Wario to approach through. I think this MU is on the same level as our Snake MU, weight is annoying ;_;
Sheik: Don't let her get close with bairs, basically. It's not so hard, and since she can't kill you out of the tilt lock the MU is honestly no worse than neutral for Wolf imo.