You know, the odd part of the story is that when Kyurem is compared to Ridley, Ridley is actually much bigger. However, if Ridley is treated as a playable, he'd obviously be resized to a point where Kyurem would be much taller.
Count Mario said:
Bigger bosses don't have to be the only options. In fact, I'd like to see more bosses that weren't as commonly large as Brawl. It would provide more originality and skill in defeating it. Despite that, I am still fine with either Kyurem or Darkrai. I wonder how it could change forms while being a boss?
Maybe for one thought, if Kyurem loses half of its HP, it'll begin to utilize its alternate forms.
Anyway, in terms of boss sizes, Galacta Knight is rather short in size, but can easily be made into a boss, thanks to his versatile boss moveset.