actually falco has far less mobility than wolf. wolf has amazing mobility in the air (better than falcos and foxs, even a tad better than CF), and hes actually only two rankings in speed behind fox believe it or not. IMO fox and wolf will cause more problems than falco will. Not only does GW have the same speed as falco, but he also severely outranges and priotizes falco, both on ground an in air (unless he tries to beat out dair with uair, i would guess they might trade hits with that, cant see GWs uair going though it completely, though i havent tested this out). they can both combo each other hard, but GW has more combos that lead to direct kills, and at lower percents. falco will do his usual dair for the killing while bair will help him too. i cant see fsmash helping out falco that much cuz GWs ground game is much better. its definitely close, but im still gonna say GW could carry a slight advantage, but definitely no more than slight.
foxs speed hurts anyone, although he cant combo GW too hard, and his blaster is much less effective against him with bucket, so racking damage will be a lot harder in this MU for fox. GW on the other hand can combo him very hard and to kill, like with falco, and he out prioritizes most of foxs moves. fox will most likely bait attacks till he gets an openning, then pressure the hell out of him. Im not sure how GWs up b fairs against foxs on shield pressure, id like to find some frame data on it, but even so theyd have to have magical timing to escape. regardless of whos in favor, i think this ones definitely still very close.
wolf is much harder to say. the same that applies to GWs combos on fox and falco apply to wolf, except wolf will probably be comboed even just a tad longer cuz of his larger weight and fall speed. The biggest differences with wolf between the other space animals is that is approach is very flexible, and he doesnt have to commit to it, and hes able to control the stage and space better with his projectile. in regards to his projectile, with proper reads, wolf can bait out a bucket from GW, and WL forward out of his blaster and beat out the projectile to him and get a free combo. Wolf, like GW, combos to kill a lot of the time, while sometimes, he will combo to set up an edge guard. all of wolfs killers will kill GW very early, and as a wolf main, i know that it can really be a matter of just one or two combos that do it for him, especially with someone of GWs weight, or lack there of. Im going to say that wolf will hold a slight advantage over GW, and this comes from experience, and a little bit of theory crafting at the tops of the metagames.
The details are all minute, and regardless of the actual outcomes, i think they are all close, giving GW a great shot at being a spacee slayer lol.
and on your point about the wall of pain, i definitely wasnt referring to in the air tactics like jiggs if thats what u though i meant. i was refferening mostly to his bair and fair, and his tilts, which all have great range and big hitboxes that can prevent and stuff approaches. those are all very quick in startup and in endlag, especially with the IASA frames on his tilts and his quick SHFFL.
. Its somewhere in kirks stream archives if you want to take a look