Robot Masters

''In 2004, Optimus Prime is alerted to a disturbance at the gates of Autobot City; a force of Decepticons led by a vicous new enemy, a tyrannosaurus rex calling himself Megatron!! Autobots and Decepticons from across the eras have converged on this time to clash over the newly-discovered energy source solitarium!''

Robot Masters is a Takara sub-line which ran from 2004-2005 consisting mainly of redecoes of previously-released toys with several all-new molds of popular characters thrown into the mix. Every all-new new mold created for the line received at least one redeco, and the line itself was the sister range to the US' own Universe_%28toyline%29, except designed specifically to sell smaller toys at lower price points.

Most repaints in the line came with new or retooled accessories, including some very attractive classic-style chrome silver guns.

As far as storyline goes, the tale of Robot Masters was told through packed-in minicomics and DVDs that came with specific toys as mentioned below.

Autobots/Cybertrons
""Magazine Specials & Exclusives""
 * RM-01 Generation One Convoy (Cybertron)
 * RM-02 Beast Megatron (Destron, Beast Wars)
 * RM-03 Rijie (Cybertron)
 * RM-05 R-Blade (Cybertron)
 * RM-07 Bound Rogue (Cybertron)
 * RM-10 Generation One Convoy with DVD (Cybertron, Metallic)
 * RM-11 Beast Convoy (Cybertron, Beast Wars)
 * RM-15 Star Saber (Cybertron, TransFormers Victory)
 * RM-16 Victory Leo (Cybertron, TransFormers Victory)
 * RM-17 Victory Saber Gift Set (Cybertron, TransFormers Victory)
 * RM-18 Road Rocket (Cybertron)
 * RM-20 Delta Seeker vs X-Gunner (Cybertron & Destron)
 * RM-21 Burning Beast Convoy + DVD (Cybertron, Beast Wars)
 * RM-22 Lio Convoy (Cybertron, Beast Wars II)
 * RM-23 Lio Convoy with DVD (Cybertron, Beast Wars II)
 * RM-24 Reverse Convoy (Cybertron & Destron)
 * Beast Convoy (Black, Hobby Japan)
 * Generation One Convoy (Black, Dengeki Hobby)

Decepticons/Destrons
""Magazine Specials & Exclusives""
 * RM-02 Beast Megatron (Destron, Beast Wars)
 * RM-04 Wrecker Hook (Destron)
 * RM-06 Air Hunter (Destron)
 * RM-08 Wingstun (Destron)
 * RM-09 Psycho-Orb (Destron)
 * RM-12 Starscream (Destron, Generation One)
 * RM-13 Smoke Sniper (Destron)
 * RM-14 Gigant Bomb (Destron)
 * RM-19 Double Face (Destron)
 * RM-20 Delta Seeker vs X-Gunner (Cybertron & Destron)
 * RM-24 Reverse Convoy (Cybertron & Destron)
 * RM-25 Thundercracker & Skywarp (Destron, Generation One)
 * Beast Megatron (Black, HyperHobby)
 * Lio Convoy (Black, Dengeki Hobby)
 * Starscream (Black, Figure King)
 * RM-17 Victory Saber (Black, e-HOBBY)