Tidal Whale

Duff McWhalen, known as Tidal Makkoiin (タイダル・マッコイーン) in Japan, was the chief of a marine museum and held rank as the Captain of a maritime security force. He often argued with Repliforce's navy. Duff guards the ocean, which has the Hydrogen necessary for the Enigma laser. He was infected by the Sigma Virus, and asks for a fight to the death against the player.

He stays from the right side of the screen and shoots out blocks of ice. The C-Shot and C-Sword cut through these, and also damage McWhalen well, as it is his weakness. When enough of his energy is depleted, he will swim to the left side, and fires ice blocks in rapid succession, trying to ram X/Zero into the spike wall on the right side.

Stage Enemies
Enemies in Duff McWhalen's stage:
 * Dejira
 * Dejira GR
 * Gulpfer R
 * Star Mine
 * U-555

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 the player fights the U-555 most of the time.
 * Duff McWhalen was named after Duff McKagan, the former bassist of the rock band Guns N' Roses.