Robot Master Serial Number

Robot Master is a name used to refer to humanoid-appearing boss robots from the original Mega Man series that possess a very advanced level of artificial intelligence. Most, if not all, Robot Masters possess a Special Weapon, which can be acquired by Mega Man (and other characters such as Proto Man and Bass) after the Robot Master is defeated.

Each Robot Master has a "consciousness", although the level of every "cognitive circuit" embedded inside each one of them varies, producing as many different "personality" types as found in people. Like humans, they can speak, and have emotional responses like shyness or anger. When Mega Man fights against a Robot Master, he takes great care to not damage their integrated circuit chip's "cognitive circuit". As long as the cognitive circuit isn't permanently destroyed, they can be rebuilt any number of times.

List of Robot Masters
Each Robot Master has a serial number, listed in the format of DLN-000, DLN000, or DLN. 000 (for Dr. Light's Robot Masters). Certain series only have two digits, and some (the Metallix Troopers) have their number with even more digits, as there's over a thousand of them.

DLN and DWN series
The DLN (Doctor Light Number) series are robots created by Dr. Light.

The DWN (Doctor Wily Number) series are robots created or remodeled by Dr. Wily. Their numbering picks up from where the DLN series leaves off, which he modified and used in his first attempt to conquer the world.

Roboticized Masters
The Roboticized Masters  are alternate future versions of the Freedom Fighters which were defeated and roboticized by Robotnik. The strongest one of them, to which Robotnik refers to as "Mecha Sonic", but Dr. Light's Robot Masters referred to him as "Sonic Man" for a short period of time, was sent into past to kill Sonic before he could ever become a Freedom Fighter. The plan failed, as Bowser Jr. salvaged him for parts which could be used by MeteorTech and later remodeled him as part of MeteorTech's "Project:Metallix", turning him into "Metal Sonic". After Metal Sonic absorbed seven Chaos Emeralds, he became Metallix. When Robotnik was sent in the future in which he roboticized the Freedom Fighters, his future self realized Mecha Sonic failed, and tries to sent the other Roboticized Masters to put Metallix under his control. Unfortunately for both Robotniks, Metallix put the Roboticized Masters under his control and turned them all into his "Team Metallix", the main command of the Brotherhood of Metallix.

The Roboticized Masters have the formula EWN (Eggman Wily Number) in their serial number, as, right before defeating the Freedom Fighters, Robotnik had a short alliance with Dr. Wily due to some anomalies in the time-space continuum (more exactly, the first Genesis Wave), alliance that ended when Wily figured out that Robotnik was so determined to defeat Sonic, he'd destroy the entire multiverse.

The full list of Roboticized Masters:
 * EWN-000 Tails Man/Metallix Tails (Miles "Tails" Prower)
 * EWN-001 Rose Woman/Metallix Amy (Amy Rose)
 * EWN-002 Knuckles Man/Metallix Knuckles (Knuckles the Echidna)
 * EWN-003 Shadow Man/Metallix Shadow (Shadow the Hedgehog)
 * EWN-004 Silver Man/Metallix Silver (Silver the Hedgehog)
 * EWN-005 Blaze Woman/Metallix Blaze (Blaze the Cat)
 * EWN-006 Charmy Man/Metallix Charmy (Charmy Bee)
 * EWN-007 Espio Man/Metallix Espio (Espio the Chameleon)
 * EWN-008 Vector Man/Metallix Vector (Vector the Crocodile)
 * EWN-009 Rouge Woman/Metallix Rouge (Rouge the Bat)
 * EWN-010 Acorn Woman/Mecha Sally/Metallix Sally (Sally Acorn)
 * EWN-∞ Sonic Man/Mecha Sonic/Emperor Metallix (Sonic the Hedgehog)
 * Unknown: M'egga Man