Hayate
From Sonic Retro
Hayate, also known as Keiji, iNVERTED and bobxp (but bobxp was a n00b) is an ASM hacker of Sonic 1. He has also made a hack of Sonic 2 called Sonic 2 Omega Plus! which featured new level art and layouts.
Keiji likes to learn more about how Sonic 1 itself works as he works on his hack, Sonic and the Secret Extended Edition. He is especially interested in VDP programming and special effects such as level transitions.