Mattrex

Mattrex was a member of Repliforce's disaster prevention team. He was stationed in the Sunhouse Mountain, apparently in southeastern Kenya. Without Repliforce's knowledge, had created an illegal warehouse to hide weapons he had created using magma energy. The Hunters discovered that Mattrex had a rocket Booster Engine necessary for the Space Shuttle. But, as he didn't trust the Maverick Hunters, assuming that they had come to retire him for his activities, attacked, leaving Mega Man X and Zero no other choice but to decalre him a Maverick.

Maverick Hunters
Mattrex was an alternate, entering in the 2nd round, where he was immediately eliminated by Bubble Crab