“	I am alpha and omega, the beginning and the end. I am that which is, which was, and is yet to come...and you will know my name is Megatron when I lay my vengeance upon you!	”
—The Covenant of Primus, "Nemesis Part 2"

The name Megatron can refer to several different characters:

• 1984 — Megatron, leader and sometimes founder of the Decepticons from Generation One. For Toys of this character, see Megatron (G1) toys

• 1996 — Megatron, a Predacon criminal and architect of the theft of the Golden Disk turned ruler of Cybertron from Beast Wars. Later became the leader of the Vehicons and was split into Savage/Noble and the Grand Mal in Beast Machines. Yeesss.

• 2001 — Megatron, a Predacon six-changing galactic conqueror from Robots in Disguise.

• 2002 — Megatron, yet another Decepticon commander, this one a pivotal figure in the Unicron Trilogy.

• 2004 — Megatron, the first Decepticon leader having departed Cybertron long ago with Rodimus and eventually seeking a peaceful existence.

• 2007 — Megatron, the former Lord High Protector of Cybertron who gets a jonesing for the All Spark and sparks a motion picture.

• 2007 — Megatron, (glorious) evil Decepticon leader from Transformers Animated.

• 2008 — Megatron, the leader of the Decepticons on Transtech Cybertron.

• 2008 — Megatron, the heroic leader of the Decepticon resistance in Shattered Glass.

• 2010 — Megatron, the heroic (at least in his optics) commander of the Decepticons searching for Dark Energon in War for Cybertron and Prime.

Megatron is not to be confused with:

• Straxus, a Decepticon commander who temporarily inhabited Megatron's body (or a version of it, it's complicated) from the Generation One comics.

• The Megatron Military, Galvatron's legion of Megatron clones from The Transformer manga series.

• The Megatron statue, a massive stone statue of the Unicron Trilogy character.

• Megaplex, a duplicate of Megatron designed to fool his enemies from the Generation One continuity.

• Mechatron, a Beast Rider from Beast Machines.

• Megabolt, Decepticon emissary, whose alternate form mimics the Big Floating Head headquarters of Beast Wars Megatron in the Beast Machines cartoon, from Robots in Disguise/Universe.

• Megastorm, younger brother of Galvatron from Beast Wars II.

• Megastar, Robots in Disguise Megatron's starship/base.

• Megazarak, an alternate dimension's version of Megatron from Transformers Universe.

• Mega-Dinobot, the combined form of Unicron Trilogy Grimlock and Swoop from Energon.

• Mega-Octane, leader of the Decepticon Commandos from Robots in Disguise, who looks exactly like the Combaticon leader Onslaught.

• Megatronus Prime, the original name for the The Fallen (multiversal singularity).

Many versions of Megatron eventually upgrade their bodies and change their name to Galvatron.