Agile

Agile is one of the three X-Hunters in Mega Man X2. When you encounter him in one of the hidden rooms in the stages, he acts as his name implies--he moves very quick and wields a mean energy saber. Not only will he slash at you, but can create some large waves in a Shoryuken style upward swing. When you encounter him again in the third X-Hunter stage, he appears in a weird ship, creating spiked platforms that fall down to you (except for where his ship is), and also sends missiles at you occasionally. Magnet Mine is your best bet.