I am currently working on a large post explaining who I would include in a hypothetical Bionicle SSB game with a 52 character roster (since that’s how many spaces there are in the OG post, and working in limitations is fun!). It still needs some work, but in the meantime I wanted to share my favorite idea.
Toa Pouks: The Kirby of Bionicle SSB. Can copy the neutral specials of any character. Other moves would naturally be stone based.