Notes:

For those who don't know, the story of Mega Man 2 (GB version) is about Dr. Wily who stole a time machine and went to the future. There, he found his future self giving up. Mega Man already won so, he now became defenseless.
Seeing his opportunity, Wily stole future rock (Mega Man) and reprogram him in the present. future Mega Man became Quint and is program to destroy Mega Man.

Basically, Quint is just recolored Rock and wears Quick Man's boomerang and Proto Man's shades and hops on a M------------ pogo-stick jackhammer hybrid.

Also, if present Mega Man dies, doesn't Quint disappear too?