He is a character from MegaMan Battle Network 4. His NetNavi is BurnerMan.EXE.

MegaMan Battle Network 4 Edit

He is Lan's opponent in the Eagle tournament. Atsuki appears to Lan and Mr. Match while they're talking. He and Mr. Match start a debate about who's better at controlling Fire Navis. They decide to Netbattle which causes the whole Net to catch fire. Lan and MegaMan.EXE manage to convince BurnerMan.EXE and FireMan.EXE to stop foghting. At the tournament, Lan and Atsuki Netbattle which results in Atsuki losing. Mr. Match mocks him from the stands. Atsuki remains a sore loser and the machine catches fire which lights fire to his pants. He runs away after that.

From MMKB, a Wikia wiki.