Mega Man 7/Wily Stage 4

All Original 8 bosses, in these locations:
[F] [SL]
[J] [C]
[T] [SP]
[SH][B]
Freezeman Slashman
Junkman	  Cloudman
Turboman  Springman
Shademan  Burstman

After defeating them, a teleporter will appear allowing you to travel to Wily himself.