Third legendary and Team Yell

A few have pointed out that the naming conventions for the two Box legendaries seem to line up with the color palette used for that version, i.e. Zacian: Cyan, Zamazenta: Magenta

This led to the speculation that the 3rd legendary will follow suit and complete a CMY trio.

I also believe that it may be more than a coincidence that team Yell and the color Yellow share a syllable.

https://i.imgur.com/VZ1soXp.png

If we look at the hillside drawing, which multiple already believe to be the 3rd legendary, we see that it's emitting an attack from it's face, the bolts emanating from the swirl could be lightning, but it could also represent loud shockwaves or sound waves i.e. Noble Roar

What if the legendary is a Yellow vuvuzela shaped shouting Pokemon?