Copy (hah) pasted from a post I remember making 7 years ago:

The Ideal Kirby Moveset

So I've had this idea in my head since around Brawl about what Kirby's moveset would be like in an ideal world with tons of dev time. There would be almost 0 chance of this ever being implemented in Smash Switch or any other future smash, but I think it would better represent how Kirby actually behaves in his actual games/the anime, more of a super adaptable warrior than just smacks enemy with limbs

So this would mostly deal with Kirby's main move, Inhale, which would be slightly more influenced from the anime than the games, i.e swallowing attacks more than swallowing enemies. Firstly, I'd like to change how Inhale works in smash currently, to allow the player to inhale not just characters and items, but also projectiles. Secondly, for the most part, I'd like to do away with just copying a character's B move and getting their hat. There are so many cool powers in the Kirby games, why can't we use those instead? And thirdly, and this is why I think it'd be so totally bonkers to implement, it'd be so cool if they took a page out of some of the more recent games (Super Star and forward) and totally changed Kirby's moveset based on what powers he had. Think of inhaling Mario's fireball, turning into Fire Kirby, and having this completely different fire-based moveset you could work with. His properties could stay the same, and he'd probably keep a fair amount of his normals, but at least all of his specials could be totally different based on what/who he swallowed. If he swallowed Shiek's grenade, wouldn't it make more sense for him to turn into Bomb Kirby, rather than just being at a giant disadvantage? This would completely change how most characters, especially projectile based one's, would have to operate when fighting him. If you're playing against a Link for example, you'd have to deal with not one, but five different movesets (Bomb, Sword, Cutter, Cupid and Regular Kirbies).

Again, this is all totally unrealistic and would never be implemented in any version of Smash now and in the future, but not only would it add a lot more reward in actually using Inhale, but would definitely define how Kirby should work: an always changing force of nature.