Character List - The order for now... could be organized better

Small/Cassette Autobot Cassettes, Slam Dance - Cassette Combiner, Decepticon Cassettes, Squawkbox - Cassette Combiner
Regular Autobot Triplechangers, Dinobots, PM Prime (smaller), Headmaster Juniors, Ultra Magnus, Insecticons, Decepticon Triplechangers, Quintesson Judge, Quintesson Prosecutor, Sharkticon, Sixshot
Giant/Combiner Computron, Defensor, Galaxy Shuttle, Landcross, Omega Sentinel, Omega Supreme, PM Prime (larger), Raiden, Road Caesar, Sky Lynx, Superion, Voltron I - Vehicle Force, Voltron III - Lion Force, Abominus, Bruticus, Dinoking, Devastator, Liokaiser, Menasor, Monstructor, Piranacon, PM Overlord, Predaking
Titan/Ship Fortress Maximus, Metroplex, Movie Ships, Scorponok, Trypticon, Unicron

Small/Cassette

Autobot Cassettes - Steeljaw, Ramhorn, Rewind, Eject SlamDance (Cassette Combiner) - Raindance (jet) and Grand Slam combine into SlamDance Decepticon Cassettes - Ravage, Laserbeak, Buzzsaw, Ratbat Squawktalk (Cassette Combiner) - Squawktalk (bird) and Beastbox combine into Squawktalk

Regular

Autobot Triplechangers - Springer, Broadside, Sandstorm Dinobots - Grimlock, Swoop, Snarl, Slag, Sludge Optimus Prime Trailer Upgrade Headmaster Juniors - Nightbeat, Minerva, Siren, Hosehead Ultra Magnus - Autobot City Commander. Insecticons - Kickback, Bombshell, Shrapnel Decepticon Triplechangers - Octane, Astrotrain, Blitzwing Quintesson Judge - Quintesson - 4 Faces of Darkness - Death, Rage, Laughter, Doubt Quintesson Prosecutor - Quintesson Sharkticon (Alt Mode) - Quintesson Foot Soldier Sixshot - Decepticon Six-Changer

Giant/Combiner

Computron - Technobot Combiner Defensor - Protectobot Combiner Galaxy Shuttle - Autobot Space Shuttle Land Cross - Multiforce Combiner Omega Sentinel - Rocket Base/Transport/Guardian Robot Omega Supreme - Rocket Base/Transport/Guardian Robot Powermaster Optimus Prime Upgrade - Autobot Leader with Apex Armor (God Ginrai) Raiden - Trainbot Combiner Road Caesar - Brainmaster Combiner Sky Lynx - Autobot Shuttle/Transport/Dinosaur Superion - Aerialbot Combiner Custom LEGO Voltron I - Vehicle Force - Custom Voltron Combiner (not really an Autobot) Custom LEGO Voltron III - Lion Force - Custom Voltron Combiner (not really an Autobot) Abominus - Terrorcon Combiner Bruticus - Combaticon Combiner Dinoking - Dinoforce Combiner Devastator - Constructicon Combiner Liokaiser - Breastforce Combiner Menasor - Stuntacon Combiner Monstructor - Monstercon Combiner Piranacon Upgrade - Seacon Combiner Upgrade Overlord - Decepticon Warlord. Separates into tank and jet. Predaking - Predacon combiner

Titan/Ship

Fortress Maximus - Autobot City/Battleship/Titan with Headmaster Spike Metroplex - Autobot City/Battlestation/Titan with Scamper and Slammer Movie Ships - Ships from Transformers the Movie (1986) Scorponok - Decepticon City/Battlestation/Scorpion with Headmaster Lord Zarak Trypticon - Decepticon City/Battlestation/Dinosaur with Full-Tilt and Brunt. Unicron - The Chaos Bringer - World Eater