BigMamemon

BigMamemon (ビッグマメモン) is the minor characters of the Digimon Adventure 02 and Digimon Adventure:. He is the Ultimate Level Digimon.

Digimon Adventure 02
In Digimon World Tour, Part 2,

Digimon Adventure:
A group of them and Mamemon worked under BanchoMamemon, helping him carry out his revenge on Babamon.