lucas/ness: really screws with their recovery options, they have to go lower putting them at a disadvantage consider pk thunderis easily messed up
False. If you know how to deal with Ness or Lucas using Ness or Lucas as far as returning goes, then Kirby with PK Flash or PK Freeze is nothing but useless. We can absorb in mid-air, you know? You're better off doing what you'd normally do to gimp Ness or Lucas instead of using their specials against them. And because there is no ground for either projectile to land on, the attack itself will eventually release itself and may possibly give health back to either Ness or Lucas. You can use it on yourself to make an edgeguard, but it doesn't mean they won't have their second jump which by the way makes it a whole lot easier to return.
As far as Inhale goes, a lot of attacks for Kirby are useless. Here are the ones I find useless against his opponents.
Mario:
Fireball can be Caped. It'll hit eventually, yes, but still.
Donkey Kong:
Giant Punch lacks range.
Wario:
Chomp leaves you open.
Zelda/Sheik:
Zelda's may have some use, but if you swallow Sheik, she can turn into Zelda and reflect the Needles.
Ganondorf:
Again, another attack that not only lacks range, but is very situational.
Pit:
Better learn Arrow Looping. Even if you do, you lack a Mirrior Shield.
King DeDeDe:
This is just totally useless unless you're trying to Kirbycide someone.
Fox:
Fox has a Reflector, something Kirby doesn't have.
Falco:
Not as useless, but not that great, either.
Wolf:
See Fox.
Captain Falcon:
See Ganondorf.
Jigglypuff:
Basically this is situational. And if your opponent has multiple jumps, then it makes the attack even more worthless.
Ness:
They weren't thinking when they made this one. They should have stuck with PK Fire. At least that made a difference.
Lucas:
See Ness.
So not all is lost, but most copy abilities aren't very useful for Kirby.