Micromasters were Transformers who downsized their bodies considerably to be more fuel efficient. Transforming into tiny cars, planes, and other vehicles, many team up in four-member patrols, while others command vehicles or battlestations which can transform into other things.
Some Micromasters were also Combiners, and could each form either the front or back half of a combined vehicle. They were not constrained to joining only with their Combiner partner; they also could join with any other Combiner, as well as to the back of any Micro Trailer (see also Combi-Micromaster).
Micromasters were usually grouped as Patrols, Squads, Transports, Stations or Bases:
Micromaster Patrols
Autobots
- Off Road Patrol (Highjump, Mudslinger, Powertrain, and Tote)
- Race Car Patrol (Tailspin, Free Wheeler, Roadhandler, and Swindler)
- Rescue Patrol (Seawatch, Stakeout, Fixit, and Red Hot)
- Battle Patrol (Big Shot, Sidetrack, Sunrunner, and Flak)
- Construction Patrol (Neutro, Groundpounder, Crumble, and Takedown)
- Air Patrol (Sky High, Eagle Eye, Blaze Master, and Tread Bolt)
- Monster Truck Patrol (Hydraulic, Slow Poke, Big Hauler, and Heavy Tread)
- Hot Rod Patrol (Big Daddy, Trip-Up, Greaser, and Hubs)
Decepticons
- Air Strike Patrol (Nightflight, Storm Cloud, Whisper, and Tailwind)
- Sports Car Patrol (Detour, Blackjack, Hyperdrive, and Road Hugger)
- Race Track Patrol (Roller Force, Barricade, Ground Hog, and Motorhead)
- Military Patrol (Bombshock, Tracer, Dropshot, and Growl)
Micromaster Combiner Squads
Autobots
- Metro Squad (Wheel Blaze, Roadburner, Oiler, Slide, Power Run, and Strikedown)
- Astro Squad (Phaser, Blast Master, Moonrock, Missile Master, Barrage, and Heave)
Decepticons
- Battle Squad (Meltdown, Half-Track, Direct-Hit, Power Punch, Fireshot, and Vanquish)
- Constructor Squad (Stonecruncher, Excavator, Sledge, Hammer, Grit, and Knockout)
Micromaster Transports
Autobots
Decepticons
- Flattop
- Roughstuff
Micromaster Combiner Transports
Autobots
Decepticons
- Cannon Transport (with Terror-Tread and Cement-Head)
Micromaster Stations
Autobots
Decepticons
Micromaster Bases
Micromaster Autobot Rocket Base
Micromaster Decepticon Jet Command Center
Micromaster Combiner Autobot Battlefield Headquarters
- Battlefield Headquarters with Full-Barrel and Overflow
Micromaster Combiner Decepticon Anti-Aircraft Base
Trivia
- The working title, and nearly final name, of the original Micromasters line was simply "Micro Transformers".