Mega Man: The Power Battle

Mega Man: The Power Battle, known as Rockman: The Power Battle (ロックマン・ザ・パワーバトル) in Japan, is an arcade fighting game. It was released together with its sequel Mega Man 2: The Power Fighters in Rockman Power Battle Fighters for PlayStation 2, Rockman Battle and Fighters for Neo Geo Pocket Color and Mega Man: Anniversary Collection for GameCube, PlayStation 2 and Xbox. The player can choose Mega Man, Proto Man or Bass to play with.

Story
Doctor Wily is up to no good yet again, and it becomes clear when he revives 18 of his old Robot Masters. The weather is acting funky, a new theme park has opened called Wily Land, and traffic in the city is worse than ever. The source of the problem: Doctor Wily. Mega Man and Proto Man proceed to stop him, while Bass tags along to destroy the inferior creations that are the Robot Masters.

Robot Masters
Mega Man 1~2:
 * Cut Man
 * Guts Man
 * Ice Man
 * Crash Man
 * Heat Man
 * Wood Man

Mega Man 3~6:
 * Magnet Man
 * Gemini Man
 * Dust Man
 * Gyro Man
 * Napalm Man
 * Plant Man

Mega Man 7:
 * Freeze Man
 * Junk Man
 * Cloud Man
 * Slash Man
 * Shade Man
 * Turbo Man

Fortress Bosses

 * Yellow Devil (fightable in Mega Man 1~2 mode or Mega Man 3~6 mode)
 * VAN Pookin (fightable in Mega Man 7 mode)
 * Wily Machine

Trivia

 * In the game's build data, there are unused sprites of the playable characters and the small Yellow Devils moving on ladders. Yellow Devil uses this small version of himself only in the final battle of the "Megaman 3~6" mode.
 * In Mega Man's ending, Dr. Light discusses that robots need to discern right from wrong by themselves, while at the same time excercising restraint from harming humans, and needs to research AI a bit more, foreshadowing the building of his ultimate creation.  Similarly, the sequel, Mega Man 2: The Power Fighters, foreshadows the creation of Zero. Zero is also briefly alluded to in Bass's ending.