Zero

Zero is a reploid who is the secondary protagonist of the Mega Man X series, as well as the main protagonist of the Mega Man Zero series. He makes a few appearances in SuperMarioGlitchy4's bloopers

Appearance
In Mega Man X he is a tall robot with white and red armor, a laser sword, and an arm cannon. In Mega Man Zero he looks similar except the white is replaced with black and he is much skinnier. SMG4's videos usually depict him in his Zero appearance

In SMG4's bloopers
He first appeared in Mushroom wars: that space series? part 1, where he was in a tour group led by the Happy Mask Salesman. His tour was cut short when Vader threw HMS off the ship.