Original unmodified version of Shazzo's Boo. Originally made for never finished "Super Mugen Bros.", but erroneously called "SMBZ" characters (they have nothing common with the actual sprite animation itself, you guys better read the readme file). Like all of Shazzo's characters, this Boo is based on Actarus' "CvS" Axel Stone (or rather Shazzo's own Super Mugen Bros. Mario) but the moveset is different from his base so he's not exactly a spriteswap.
Unlike other Super Mugen Bros. characters, this one is much less known as he wasn't featured in the so called "mugen mario bros. z mugen character pack" (sic), plus due to closure of eSnips, this Boo was quite hard to find for a long time until late 2010s (from what I can remember)