|For his video game counterpart, see NumberMan.EXE.|
NumberMan.EXE is the NetNavi of Mr. Higsby in the MegaMan NT Warrior anime series, with the two of them starting out as minor antagonists during their debut before reforming and becoming allies with Lan Hikari, MegaMan, and the rest of their friends.
During his and Higsby's debut in episode 4, the two of them trap Maylu, Dex, Yai and their teacher Ms. Mari in the classroom and challenges Yai to a NetBattle for her rare Battle Chips. Glide is forced into battle and is nearly defeated before MegaMan and Roll breaks through the barriers NumberMan had created. After NumberMan is defeated, Higsby, who was scolded by Ms. Mari for his recent actions, promises to be good from that point on.
Shortly before the N1 Grand Prix, Higsby unintentionally causes a bug in NumberMan, leading to the latter going on a rampage in the Net and thus needing to be calmed down by Lan and his friends. NumberMan fights during the N1 Grand Prix, but ends up losing to WoodMan despite using rare chips and in part because of his heavy reliance on them.
In the episode "The Virus Factory", NumberMan was disconnected from Higsby when Grave attacked NetCity with a never-ending swarm of viruses. He managed to fight off a sizable number of them on his own before Lan and the others managed to access him and save him when his energy finally ran out.
Near the end of the first season, when the Grave Virus Beast was attacking NetCity, NumberMan stayed behind willingly and tried to challenge it. However, he quickly Jacked Out in fear before it could delete him, but complained to Higsby for not pulling him out sooner.
NumberMan and Higsby appear again in Axess. In the episode "A Dangerous Bowling Game!", Higsby takes Ms. Mari out on a cyber bowling date, which Lan and Maylu end up taging along due to a slight misunderstanding. Higsby remembers he's not good at sports, so NumberMan comes up with a plan to manipulate the system so that everytime Higsby bowls, he'll get a strike. This attracts the attention of BowlMan, who, under the influence of a Dark Chip, captures NumberMan, ties him up onto a giant pin, and nearly deletes him with a giant Bowling Boomer. MegaMan intervenes and saves NumberMan, and later deleted BowlMan with Cross Fusion when he entered the real world via a Dimensional Area. NumberMan and Higsby later apologize for cheating.
Later on, NumberMan is part of Higsby's NetBattle Tournament, but loses to Shuko Kido and her NetNavi SpoutMan due to the former's "bad luck." When SpoutMan starts crying at the power plant, flooding the system and threatening to destroy the plant, MegaMan and NumberMan attempt to stop him, but are unable to get past the veil of water with direct attacks. When NumberMan suggests they work together after learning SpoutMan's weak point, MegaMan gains Number Soul by fusing with NumberMan. Upon using Number Soul's trajectory calculation abilities and high process analysis features, the fused duo tactfully uses a Doom Dice from the side to blow away the water veil, and plug up SpoutMan's spout by making a giant leap with a retracted ElectroSword, ending his tantrum.
NumberMan later appears at the end of Axess as part of the group that Raika recruited to help Lan and MegaMan stop a Cross Fused LaserMan. He assisted in deleting the viruses that were guarding the giant Dimensional Area Generator, thus giving SearchMan a chance to shut it down for good.
In Beast, a Zoanoroid version of NumberMan appears and steals NumberMan's identity while tricking all of his friends into believing that he is the real one. However, when the real NumberMan appears, the group is confused, but then remember that the Zoanodroids have a Beast form and they attack both NumberMen. As the Zoanodroid evolves in a rage, the group now know who the real one is and chases the fraud away. In the next episode, Zoano NumberMan is deleted by Zoano GateMan.EXE.
Zoano NumberMan is tinted light blue instead of green. Aside from that and the fact that one of them is Zoanoroid, they are the same in everything from moveset to attack power.