I still think Kirby wins with speed amp + transmutation, the latter of which Asura has no counter for.
I still find it to be a huge stretch, because Kirby pulling out the cook ability to instantly oneshot an enemy is totally not in character neither if you look at it from a lore perspective nor a game mechanics one.
There's a reason is Kirby always needed stronger power ups, items or exhausting battles to take down his enemies, instead of magically evoking the all-powerful oneshot ability.
He can also use copy abilities to greatly amp his AP (Fighter Kirby) and durability (Metal Kirby).
They still don't grant multiplier, and Asura himself has several way to increase his already higher AP.
And even if he were to enter the fighter ability, he'd still fall short in front of Asura's greater skill, experience and various tools.
Jet and Wheel Kirby give him speed boosts, so he can get in close.
To an extent, they never made him so fast that he could blitz opponents, and Asura's got experience against similar opponents, aside from his Analytical Prediction that helps with that.
He will use his copy abilities that he can use at will if he needs to.
Like
here
That remains a single instance in a mini game tbh.
https://static.wikia.nocookie.net/v..._Quest-Kirby_Mass_Attack.gif/revision/latest?
Also, asides from his Metal Ability, Stone Kirby also amps his durability immensely.
The stone ability is very ineffective in combat, since it forces Kirby to an immobile state and he can only deal damage by dropping onto Asura, something he can easily counter with greater skill, prediction and LS to toss him away.
So he has invulnerability/higher durability with Copy Abilities, dura neg via transmutation, speed, Attack Reflection, and vastly superior range.
Actually, Asura still outranges Kirby by a large degree as said a few times.
Kirby's planetary range isn't different from Asura's punches spreading all the way through Wyzen's body (which is bigger than a planet) and his interstellar is always AP based or limited to him launching away opponents with the final hit.
