Bowser can chaingrab Falco right back and he has the moves to punish the bird well.
He doesn't suffer from lazers more than anybody else really.
How can you chaingrab Falco if you can't even get close to him without going through trouble? Falco can at least silent laser>grab for some frame advantaged approaches, all you guys got is run in>grab if all goes good, or hope that he airdodges to the ground/shield one of his approaches and grab. And why is it that he doesn't suffer from laser approaches like everyone else? Bowser's hurtbox size (his height) makes it so Falco can pressure heavily with SHDL until you guys get close: pretty much your jumping approaches are nulled in this matchup when you're trying to approach, which is what you'll be trying to do at all times while Falco is shooting lasers at you from anywhere.
And Snake, he can control the field with his many explosives, as well as tilt you when you get close. Bowser's size makes it so that Snake can hit you pretty **** hard, as well as your attacks' ending lag makes it easy for him to catch you with surprise attacks (like a random DACUS while you land, or a tilt on your whiffed grabs).
Both the matchups seem so difficult for Bowser... I don't know why you guys can say that. Unless Bowser has some super awesome thing to turn around those cons with pros of the same weight...
When does your fresh chaingrab stop working on Bowser? It's a bit beneficial to get hit by a few lasers in this case, assuming it's not like 70% or so.
Bowser's heavy, big, and has no combo breakers, so escaping the chaingrab is pretty much impossible until like 5x-6x% as far as I know... And if he grabs you and makes it to the edges before those %s, then you eat a spike from which, if you don't find a way to avoid, you won't recover from.