Intro
PT is split into 3 people: Squirtle, Charizard and Ivysaur. Squirtle's main traits are his damage racking abilities. He has relativly good mobility in the air, on the ground, and quick attacks. This makes for him being all up in his face. Charizard is the powerhouse of the group with decent range on attacks He has the ability to glide which helps on the horizontal recovery, but it's probably the slowest glide in the entire game. His UpB has super armor frames during the start-up. Ivysaur is believed by many to be the weakest in the group. Horrible aerials, tether recovery, and overall a bad character. Dispite these weaknesses he does have some comboing abilities and can kill.
The ability to fight as one unit when split into 3 is a boon, and a curse. If starting with squirtle, one can rack damage with him before switching characters who can kill more easily. The downside is that they have a fatigue system. The time limit for any of the pokemon is 2 minutes max. Everytime they perform an aerial, tilt, special or smash attack, they loses 1 second from that timer. Once they exceed this timer they will be fatigued and start doing less damage and knockback. The amount multiplier of this, I believe, is .7 of the original non-fatigued state. This is a considerable reduction in knockback, they are doing roughly 2/3s the amount of knockback they could be doing, including whatever stale moves they have. This can be corrected switching. But switching doesn't reset the timer entirely for the fatigued pokemon. For every second they spend in limbo, the timer is reset by 2 seconds.
With the fatigue system and forced switches on lost stocks means that you'll never face the same character for all 3 of your stocks. If you do, the one unit should be so fatigued that they won't ever be killing you.
Squirtle
IMO, this is Falco's hardest MU he will play against PT. Squirtles small size will make it hard to laser him, his attacks will combo well into each other that you'll be getting juggled a lot if you slip up. Utilt can lock falco in place into the mid 30s I believe. But our CG > spike or CG > tech chase can more than make up for that amount of damage we could take from Utilt chain. Plus, Squirtles air release is such that he cannot do anything till he lands on the stage. I'm unsure if Falco can abuse this, but it's something to take note of. Squirtles recovery is ok. He has a good 2nd jump and a good priority UpB, but it can be edgehogged. Squirtle has access to water gun which acts just like mario's fludd, so be careful to not do any predictable phantasms onto the stage when they have this charged. Squirtles SideB I believe is impervious to attacks, but it can be deflected with a strong hit and you can just grab him out of it.
In short, I would give the MU 55-45 Falco's Favor.
Ivysaur
This is probably the easiest MU for Falco to undertake. Ivysaur has limited options against us. His SideB can be reflected. His has the tether grab (forgettng the real name) which is punishable if it misses. Having a tether recovery makes it easy for us to edgehog him. His aerials are slow, with only Nair and Bair being useable. Nair should typically being use OoS I believe, and Bair in close range. Ivysaur just doesn't have any reliable approaches against Falco. And trying to kill falco should be difficult for him. He does have a number of combos that can rack damage up on Falco if your not aware of them. Grab > UpB is one such combo. Nair > bullet seed. Bullet Seed is rather difficult to DI and can rack up a ton of damage on Falco. CG > spike will work. But I believe that it can be meteor canceled with UpB and instantly grab the ledge.
65-35 Falco. Maybe 60-40.
Charizard
Charizard really reminds me too much of DK. His tilts are rather quick in execution and ending lag with large range. His grab range is large and smashes powerful. But he suffers from the same things that DK had and that was being a large target, limited approaches on us, and CG able. Charizards recovery is also bad. He has 2 midair jump and can cancel into a glide that is frankly extremely slow. His UpB has good veritcal height, super armor frames, but limited horizontal coverage. Charizard doesn't have many combos against us, but he does have a good edgeguarding game against us. Rock Blast and Flamethrower **** phantasm recovery. Flamethrower can pretty much forsake our recovery like bowser could, and rockblast if timed right can just kill us.
60-40 Falco.
Overall, I would say that the PT MU number is 60-40.