So I found some stuff in SMW

[Sonikku]

Those capes are used in the Super Koopa's death animation, I believe. Is it possible those "walking flame" sprites are parts of a Blargg?
Also, just as a note, I'm pretty sure I already included those Dino Rhino sprites in my SMA2 sheet, so there's no need to update it on that version.

I checked, there's 2 pairs of capes, one used and one unused, the ones I ripped are unused. The walking flame uses a similar shading style like the Blargg, but I checked, it seemingly wasn't used anywhere, as the Blargg's pieces are all in a small group on their own. And the unused Dino Rhino sprites in your sheet have a slightly brighter palette than the original SNES versions, thus why I ripped it.