Tidal Whale

Duff McWhalen (Tidal Makkoiin in Japan) was an old sea Maverick Hunter before being infected by the Sigma Virus. He shoots out blocks of what appears to be ice. The C-Shot and C-Sword cut through these, and also damage McWhalen well, as it is his weakness. Duff guards the ocean, which has the Hydrogen necessary for the Enigma laser.

Stage Enemies
Enemies in Duff McWhalen's stage. U-555 [Rest of list needed]

Trivia

 * Duff McWhalen's stage music is a remix of Bubble Crab's stage music from Mega Man X2.
 * His level is one of the hardest in the game according to fans because Mega Man X fights the U-555 most of the time.