today in smbx forums postings: everyone misuses the term 8-bit in one way or another
does this use the 8-bit palette?
no. in fact, it doesn't use the 24-bit palette, either.
is it 8-bit style?
yes (minus colour). 8-bit shading style is restricted by having 4 colours (3 + alpha in most cases) per tile (8x8 or 16x16) to work with. This tileset could use more colours on some tiles, but it is not required.
IT ABSOLUTELY NEEDS SHADING?!?!?
Exhibit 1
Exhibit 2
Exhibit 3
Exhibit 4
Exhibit 5
will this fit with 8 bit styled graphics?
yes
will this fit with smb1 8 bit graphics?
no. you can already tell in the screenshot that the SMB1 block sticks out.
then again you COULD argue
yes, as much as everything on these forums that's advertised as smb3 styled fits with smb3 sprites: only for people who don't give a shit
then again
style mixing isn't bad
style misnaming is misleading