This is a tool-assisted speedrun. Mega Man on his second adventure through the monochrome world. See frame perfect sliding and a well planned speedrun as well as deliberated use of items and weapons.
From Wikipedia:
Mega Man II, known as in Japan, is a video game developed by Capcom for the Nintendo Game Boy. It is the second game in the handheld version of the Mega Man series after Mega Man: Dr. Learn about Mega Man II
