Well now, I main R.O.B. and second wolf.
Here I go:
-Approaching: Be warned of the laser spam. Chances are that the first move a Wolf will do after the match starts is fire off a few aerial lasers. These can be dodged relatively easily. Then, they will proceed to RAR b-air until both characters meet.
*Now, I don't know the priority of Wolf's b-air, but I do believe it beats out f-air. So, be cautious and try to time an early move like a tilt.
-In the Fray: Wolf has a galore of options. If Wolf is approaching you, he can attack with a lagless f-air, an RAR b-air, or an n-air. He will probably avoid the dash attack because of its weird timing. To take care of the f-air, just run away. It has high priority and will allow the WOlf to juggle you with u-air. If your fighting a b-air, projectiles are your best bet unless you want to time a b-air. N-air has really low priority and only sometimes staggers so just use an f-air.
-Offstage: If you are offstage with Wolf edgeguarding, you have nothing to worry about. Wolves are afraid og heights due to the fact that THEY CAN'T RECOVER!!! So the worst you will face is a d-air, which will probably miss. If the wolf is offstage, you probably already won the stock. Wolf's recovery is uber predictable and easy to gimp. To counteract Fire-Wolf, just edgehog.
-Wolf illusion: Okay then, for those of you who do not know, wolf has an AT called scarring. This is where we use side -b near a ledge but hold down so we avoid the sweetspot. This will cause us to appear onstage and has a high chance of hitting with the perfect hitbox. To counter act this, know that Wolf will primarily appear three wolves (odd measurement) away from the edge. Knowing that, justcahrge up a smash.
Stage game: To counteract a Wolf, choose Final Destination. We have a lower range of scarring there so our recoevery is REALLY predictable. However, NEVER CHOOSE YOSHI'S ISLAND. This is Wolf territory. There is a third type of scarring here which involves scarring just as Wolf jumps from the ledge. Wolf will slide along the stage and land right in the middle. If you are situated there, you will be hit by a perfect spike and recerive over 10% damage.
Tell me (or PM) if I should put in more.