Numemon

Numemon 'are villains in Digimon Adventure and 'Digimon Data Squad

Digimon Adventure
The DigiDestined encountered the Numemon in the sewers after making it out of the factory that Andromon was in. Some were seen in fake vending machines where one of them tried to get a date with Mimi and got angry when she turned him down. The Numemon chased them, leading each of the DigiDestined into Monzaemon which scared the Numemon away.

Digimon Data Squad
Marcus Damon, Agumon, Yoshino Fujieda, Lalamon, Thomas H. Norstein, and Gaomon encountered a Numemon fleeing into the sewers. It was destroyed by Lalamon. A nightmare induced by MetalPhantomon caused Marcus to fight multiplying Numemon while a Drimogemon was making off with his sister,