They need to turn inhale into a command grab already
Anyway, on topic, I want to talk about some of the copy abilities I find useful:
-Megaman: I don't play this MU often enough from Kirby's point of view, but B-reverse and diagonal metal blades allow Megaman to combo into kill moves and free grabs. I am sure that despite his slower ground speed Kirby can get some of this too.
Also in a 1v1 scenario this skill allows you to stay in Megaman's blind spot while still applying pressure with projectiles. The ability to Zdrop this is also a godsend so if you have this ability don't forget you can throw the blade down to pick it back up for Z-drop follow ups later.
I am sure you can, like Megaman, use the Z-drop blade to combo into a Dair spike offstage by dropping the blade near the edge and Dair'ing a little bit past it. This makes a 2 layered wall where the blade actually knocks them back into the Dair, meaning they can't just air dodge through the spike.
-Pac Man: Oh god this ability is godlike. However to make best use of this ability, you have to understand what each fruit does:
*Cherry: Comes out fast but doesn't go far. Stays out a long time allowing you to regrab it for Z-drop shenanigans.
*Strawberry: A bit faster to come out than the cherry but slower than the peach. Just does a small hit. Probably the least useful fruit but can be useful to interrupt someone running at you.
*Peach: This is the fastest moving fruit (Not counting the key). It comes out very fast, has decent hitstun (Not enough to combo off of though) and is a fairly solid projectile.
*Apple: Here's where it starts getting fun. This projectile has good knockback (And can kill at high percents), bounces along the ground (Can go under other projectiles if timed correctly) and most importantly when thrown from the air goes at a 45 degree angle downwards. As a character with a billion jumps, Kirby can heavily abuse that, and it is very good for gimping due to the low trajectory. When Z dropped or thrown up/down it will bounce in place.
*Melon: SONIC BOOM! Anyone who's played Street Fighter knows what I'm talking about. This slow projectile has a TON of knockback and can kill at almost the same percents as the key. It travels slowly horizontally with a slight dip the longer it moves. This projectile forces a reaction and is slow enough that you can follow behind it to punish whatever that reaction may be. On top of that, on hit or block you can regrab the melon as it bounces off the opponent to use it again. Throwing it upwards makes it almost stand in place with an active hitbox, and down/zdrop makes it move very very slowly downwards. Use this for a safe approach. It clanks or beats out just about any projectile as well.
*Galaga ship: Oh the combos. This is definitely a combo extender. I have not played around enough with Kirby to know how to combo and regrab it at the same time, though I know Pac Man can with Fair and DA. I'm sure Kirby can too. When thrown it moves forward a bit before doing a loop and going up and away at the end. During this entire period it is active and can be regrabbed. On Battlefield it will hit the platforms when it does the loop and land there, allowing for easy Zgrabs. It will still do the loop when thrown up and down, though when Z-dropped it just tumbles and bounces once.
*Bell: This is the most massively underrated fruit this move has to offer. This item has a really weird angle, going up and forward then straight down, lingering after it lands allowing for a regrab. It stuns any opponent it hits, and can kill. In teams, this is pretty much the only fruit you should be using. In singles it's a bit less useful but still great. All of Kirby's throws leave them at good angles to get hit by the bell (% dependent) and it can be used to punish aerials and landings if you have good spacing. It's also good for getting back on stageas ledge-drop>DJ>Bell clears out the entire ledge area for Kirby (Pac Man can't do this as easily as his DJ brings him onstage). When thrown up, down or Zdropped the bell goes straight up and down, though it moves slower when Zdropped (I can't remember if it stuns when Z dropped either). The stun allows you to hit them with pretty much any aerial (Though I would assume Dair or Bair would be the go-to moves) and if you hit them on the ground all tilts, and DA work, and if you're close enough smash attacks as well.
*Key: This one is the most well known and the most straightforward. It travels fast, can kill and does good damage. I would suggest not using it until you have to close out a stock and instead use every other fruit the rest of the time to keep the opponent guessing on what's coming. Also charging to bell and *almost* to key then stopping means that when you want key you can double tap B and he'll do that last bit of charge to key then throw it, allowing you to surprise an opponent with a different fruit than what he thought you had. It can be grabbed, but the easiest way to do this is to get hit while charging to it, which is easier to do in teams than in singles, and significantly less dangerous. Never Z-drop this as you run the risk of giving it to your opponent.
Anyway I have to go but I'll come back and add more later.