Marvel vs. Capcom: Clash of Super Heroes

Marvel vs. Capcom: Clash of Super Heroes is a fighting game released for arcade, PlayStation and Dreamcast. It features Mega Man as a playable character and Roll as a secret character. There is also a Mega Man stage which features Dr. Wily giving orders in the background and other robots like Mad Grinder, Dark Man 1 (not seen in the PlayStation version), Baccones and several Mets.

The Mega Man in this game is noticeably more juvenile than in other appearances.

Capcom characters

 * Mega Man
 * Ryu
 * Zangief
 * Chun-Li
 * Captain Commando
 * Jin
 * Morrigan Aensland
 * Strider Hiryu

egis

Marvel characters

 * Captain America
 * Gambit
 * Hulk
 * Spider-Man
 * Venom
 * War Machine
 * Wolverine

Secret characters
Capcom:
 * Roll
 * Lilith-Mode Morrigan
 * Shadow Lady

Marvel:
 * Onslaught (final boss)
 * Hyper Venom
 * Mega War Machine
 * Orange Hulk

Endings
Mega Man: Mega Man acquires part of Onslaught and acquires one of his special attacks, mimicking the weapon gain screen from the games. In the Playstation port of the game, this allowed Mega Man to actually use this attack as a Super move.

Roll: Roll communicates to Dr. Light via Rush Hologram and tells her she beat the "stage" before Mega Man. Impressed, Dr. Light powers her up and she leaves to defeat Dr. Wily. Mega Man then arrives shortly afterward and kneels over in frustration.