LarkMan.EXE

LarkMan.EXE (SwallowMan.EXE in Japan) is a NetNavi. He appears as an optional boss in Battle Network 5 (in UnderNet 1). He is referenced on the SciLab BBS as a "cyber-lark" that someone saw flying into the UnderNet. The discussion then starts to be about the UnderNet rather than Larkman Himself, though.