Ike gets owned by blaster. He can't side-B approach or turnaround bair you if you're blaster spamming. Campy Wolf beats Ike.
Campy Wolf destroys Samus as well.
One of the few characters capable of punishing Wolf's mistakes is Meta Knight. I lost pretty badly to a MK player at a tournament, inspiring me to pick up the character, and he seems to be able to do quite well against Wolf. It's all about mindgames when you have 2 very quick characters.
Wolf dittos are actually pretty scary. The matches go by really fast.
Olimar vs Wolf is a pretty dumb matchup. Wolf can power through Olimar's pikmin smashes with a lot of his attacks, or clash killing the pikmin, and edgehog. Olimar has a lot of reach but a smart Wolf will attack diagonally or use his attacks that power through/clash.
I'm pretty even with a local Marth main and a local Toon Link. I don't see any clear advantages or disadvantages for either character vs Wolf.
Pit is a very annoying matchup. He's even better at spamming than Wolf himself, trades attacks pretty evenly with a Wolf, and refuses to die with amazing recovery. I haven't lost to Pits much but they've not been easy to beat either.