edit, just went through some threads, and almost nobody mentions BFR being Kirby's starting move? people usually say Kirby starts with suck, which gonna kinda suck against someone who completely resists your LS.
Kirby's BFR is suck or moreso his inhale and it is his starting move but character's in the anime are constantly shown to resist it like Meta Knight who is completely unfazed by it, he'll likely open with it against Nameless King to either A. inhale him to his stomach dimension (incredibly unlikely to work due to the LS) or B. inhale smth from Nameless King to gain an ability.
even if kirby does inhale and get NK's miracles or such, he resists the damage type of his own attacks, which makes it pretty irrelevant even if kirby manages.
very unlikely he'd get the chance to, considering the Class M + Flight means the dragon is for the most part going to resist the suck for most of the fight, until he goes to the ground.
While humorous to think about, Kirby trying to launch his stormdrake away, or the Nameless King himself, is not gonna end well with that LS advantage he has.
As a dragon slayer, he's already dealt with AoE attacks before from fighting the ancient dragons. other than that, The King has his own AoE attacks with his Stormdrake, Miracles, and regular attacks so he can match with kirby in that department.
