Mecha Dragon
Picopico-kun
Originally, the floor tiles where the boss pieces emerged from would become bottomless pits, making this encounter exponentially more difficult. The idea was scrapped and the environment remains solid throughout the fight. Picopico-kun is called “Block Phoenix” in The Official Guide to Mega Man, which loosely retells the events of the first three Mega Man games.
Guts Tank
Guts Tank, sometimes referred to as the Guts Dozer, is modeled after Guts Man from the first Mega Man game.
Alien
Mega Man 2 is one of only two Classic Mega Man games where Dr. Wily is not the final boss. The alien turns out to be merely a hologram created via a small flying object controlled by Dr. Wily. The alien’s only weakness is the Bubble Lead weapon, which damages the machine projecting the hologram.
Boobeam Trap
Wily Machine No. 2