Tekkamon

Tekkamon is an Ultimate Level Machine Digimon that looks like Giromon except it has no horns, wields a sword and is purple. His name comes from the Japanese word "tekka"men, which means iron mask. He was created by an evil hacker with the purpose of countering the "Net Keeper", Giromon.

Digimon World
Tekkamon first appeared as a mini-boss before SkullGreymon in the basement of Grey Lord's Mansion. Later he appeared in Colosseum Tournaments and the Back Dimension.

Digimon Digital Card Battle
Tekkamon belongs to the Dark Speciality, however, it is mistakenly stated to be a Champion Digimon in this game.

Digimon World 2
Tekkamon digivolves from Nanimon, and can digivolve further into Piedmon.

Digimon World Dawn/Dusk
Tekkamon digivolves from Omekamon at LV 37 with 170 attack and 150 speed and can either digivolve to Puppetmon or DNA digivolve with Volcamon to Boltmon.

Attacks Variations / Subspecies
 * Electronic Blast Sword (斬電剣): Loads electrical power in his sword and then he gathers flames on it for a shocking-exploding single slash.
 * Slamming Skull (Skull Stand): A super hard head-butt causes explosion upon contact.
 * Giromon
 * Thunderballmon
 * Mamemon / MetalMamemon / BigMamemon
 * PrinceMamemon