Loonatics Beyond

Planteers

 * Captain Planet (David Coburn) - the elemental warrior, this incarnation takes on the appearance of a superhero.
 * Gaia (Whoopie Goldberg) - the spirit of the planet. She is a modern rendition of the primordial Greek earth titan, possessing an amalgamation of physical characteristics from all human races.
 * Kwame (LeVar Burton) - From Zimbabwe, Africa, Kwame possesses the power of Earth. He has a soft spot for plant life, and even runs his own greenhouse on Hope Island.
 * Gi (Janice Kawaye) - Hailing from Malaysia, Gi controls the power of Water. Gi is a self-proclaimed marine biologist.
 * Wheeler (Joey Dedio) - From Brooklyn, New York, Wheeler controls the power of Fire.
 * Linka (Kath Soucie) - From the Soviet Union (in later episodes stated as being from Eastern Europe after the Communist regime's collapse), Linka has the power of Wind.
 * Ma-Ti (Scott Menville) - From the Amazon of Brazil and raised by a Kayapo Indian shaman, Ma-Ti wields the powers of Heart and telepathy to instill caring, passion, and sympathy into the people of the world to care for the planet.
 * Suchi (Frank Welker) - a pet spider monkey.
 * Allies
 * Commander Clash (Louis Gossett Jr.) - An army soldier stranded in an island. The Planeteers encounter him when the eco-villains cause their vehicle to land on the island.
 * Joel Kningston (Isaac Hempstead-Wright) - a 14, yr. super genius and environmental activist who has a way to contact the Autobots.

Autobots

 * Optimus Prime (Peter Cullen) - the awe-inspiring and compassionate leader of the Autobot forces.
 * Ultra Magnus (Jack Angel) - a soldier and nothing more. He very much prefers taking orders to giving them, and even avoids opportunities for higher responsibility.
 * Goldbug (Dan Gilvezan) - one of the smallest and physically weakest Autobots. While his stature allows him to do his job better than most Autobots could manage.
 * Ratchet (Scott Menville) - the Autobots' Chief Medical Officer. If something's broke, he can fix it.
 * Blaster (LeVar Burton) - A powerful fighter who tends to make his presence known, you can find him at the forefront of any situation in which he's involved.
 * Sky Lynx (Paul Eiding) - the unbelievably talented, unsurpassably skilled, and altogether magnificent robot behind most of the greatest, most adventurous, and most daring moments in all of Autobot history.
 * Metroplex (Paul Eiding) - the Autobots' ultimate weapon, their greatest and final defense. He is a gigantic, towering warrior, capable of channeling awesome energies through his weapons.
 * Perceptor (Paul Eiding) - a scientist, one of the most astute minds the whole of Cybertron can offer.
 * Dinobots
 * Grimlock(Gregg Berger) - A Dim-witted and sluggish, his disposition is much more suited to the Decepticons. After all, he values power and strength over wisdom and compassion, and furthermore, he doesn't really get along with most Autobots.
 * Swoop (Michael Bell) - the friendliest and most outgoing of the Dinobots.
 * Sludge (Frank Welker) - a perhaps undeserved reputation for being dimwitted, but Sludge is the genuine article. He makes the other four look like scholars in comparison.
 * Slag - a surly, mean-spirited, nasty, and disturbingly violent, to the point where it really is a wonder he's not a Decepticon.
 * Snarl - an unhappy, unsociable loner. He grudgingly follows Grimlock's orders and that's about it.
 * Protectobots
 * Hot Spot (Dan Gilvezan) - Whether it's a raging battle or a raging fire, he's right in the thick of things -- and that's where he's happiest.
 * Streetwise - the black-and-white Protectobot, That knows every street and parking lot
 * Blades (Joey Dedio) - a dirty, underhanded street brawler at heart and proud of it.
 * Groove (Frank Welker) - a free spirit, man. A full fuel tank and an open sky above him is all this chopper needs to mellow out and enjoy whatever good vibrations the open road brings his way.
 * First Aid (Michael Bell) - one of the most empathic and compassionate beings you'll ever meet.
 * Defensor (Scott Menville) - The combined form of the five Protectobots, Defensor exists specifically to safeguard human life.
 * Aerialbots
 * Silverbolt - defined by his extreme fear of heights and by his refusal to bow to it. He constantly struggles to project the image of a brave, determined soldier to hide his fear from others.
 * Air Raid (Rob Paulsen) - A reckless, the way he dives out of nowhere, charging enemy units head on.
 * Fireflight - a childlike sense of wonder with the soul of a daydreamer, resulting, unfortunately, in one major menace to airborne navigation.
 * Skydive - the Aerialbot's resident bookworm and is fascinated by the history and science behind aerial warfare.
 * Slingshot (Rob Paulsen) - a loud-mouthed, bragging jerk. Many believe that his annoying, self-aggrandizing, and abrasive personality is a cover for his insecurities over being the smallest and weakest Aerialbot. Just as many couldn't care less and just wish he would shut up, and/or go away.
 * Superion (Cam Clarke) - is the combined form of the Aerialbots: In his combined form, his thought capacity is reduced to two things: destroy the Decepticons, and protect the humans.
 * Technobots
 * Scattershot (Jack Angel) - Leader of the Technobots who just wades into a Decepticon patrol and doesn't come out until he's broken all his crayons and scribbled all over the mazes he couldn't solve.
 * Strafe - a really nice guy, one of the kindest, gentlest mechanoids you could ever hope to meet, and he's a crack shot with his heat-ray rifle, too.
 * Lightspeed - A highly intelligent, strong, fast, and considered dashingly good-looking by Transformers standards.
 * Afterburner-(Jim Cummings) - hating authority, hates being given orders, and is generally a seething cauldron of anger.
 * Nosecone - natural slowness of thought and action is often taken for laziness, but this is a misperception.
 * Computron (Dan Gilvezan) - the combination of the five Autobot Technobots. Typically, the combiner process dulls the wits of the individual transformers, however, such is not the case for Computron.

Eco-Villians
 * Hoggish Greedly (Ed Asner) - A pig-like human who represents the dangers of overconsumption and greed, Hoggish was the first villain Captain Planet and the Planeteers encounter.
 * Rigger (John Ratzenberger) - Hoggish Greedly's henchman.
 * Verminous Skumm (Maurice LaMarche) -  a large, mutant rat, born and raised in a sewer. Skumm is determined to take over the Earth.
 * Dr. Blight (Meg Ryan) - A mad scientist with a half-scarred face hidden behind her hair who represents the dangers of uncontrolled technology and unethical scientific experimentation.
 * MAL (Tim Curry) - Dr. Blight's evil highly-intellectual supercomputer and a parody of HAL, the supercomputer from 2001: A Space Odyssey. MAL has control over computers, and can infect any computer with a virus.
 * Duke Nukem (Maurice LaMarche) - one of the eco-villains, a radioactive mutant who thrives on radiation and toxic wastes.
 * Leadsuit (Frank Welker) - Duke Nukem's cowardly accomplice who is named after the radiation suit he constantly wears to protect himself from Nukem's radioactive aura. He works for Duke under the belief he will rule the world alongside his boss when he brings about the nuclear age.
 * Looten Plunder (Corey Burton) - A wealthy poacher and crooked businessman who represents the evils of unethical business actions, his name is even a reference of the phrase "Loot and Plunder."
 * Argos Bleak (David Kaye) - Looten Plunder's main henchman, pilot, and leader of Plunder's private army.
 * Sly Sludge (Jim Cummings) - An unscrupulous trashman who represents ignorance and the dangers of short-term thinking.
 * Ooze (Cam Clarke) - Sly Sludge's sidekick.
 * Tank Flusher III (Frank Welker) - Sly Sludge's strongman servant.
 * Zarm (Corey Burton) - Zarm is the former spirit of the planet who left Gaia in search of other worlds and ended up laying other populous planets to ruin lacking Gaia to balance out his methods. He represents war and destruction.

Deceptions

 * Galvatron (Frank Welker) - Leader of the Deceptions. Once Megatron, but was reborn from his death throes in a Faustian pact with Unicron.
 * Cyclonus (Jack Angel) - a genuinely loyal and competent second-in-command is a near impossibility.
 * Scourge (Corey Burton) - Galvatron's implacable tracker and leader of his own cadré of huntsmen, the deadly Sweeps.
 * Soudwave (Frank Welker) - one of Megatron's most reliable troops, and he has positioned himself comfortably and irreplaceably in Megatron's upper command structure and commands a legion of cassette troops to carry out tasks big and small..
 * Astrotrain (Jack Angel) - A Triple Changer. He craves having this power over others. Single-minded, you may say, but when most of your time is spent transporting troops around, you have to take your jollies where you can.
 * Trypticon (Brad Garrett) - A very large T-Rex like Deception that can transform into a large city.
 * Constucticons
 * Scrapper (Michael Bell) - the engineer of the Constructicons.
 * Hook - The snob of the Constructicons, Hook considers himself an artist.
 * Bonecrusher - A Constructicon that beauty in rubble-strewn wastelands and longs to transform pretty much any location he happens across into one.
 * Long Haul (Gregg Berger) - The problem, as Long Haul sees it, is that he gets all the work and very little of the excitement and the glory that goes with being a Decepticon.
 * Mixmaster (Frank Welker) - The Constucticons Cement mixing expert how can it's reduce, refine, and recombine into virtually any raw material the Decepticons need.
 * Scavenger - A self confidant but his simpering, doting eagerness to please just reinforces the other Decepticons' opinion of him as a worthless loser.
 * Devastator (Scott Menville) - an immensely powerful warrior, and in that sense the combination of the Constructicons into a merged being is a huge success.
 * Stunticons
 * Motormaster (Louis Gossett Jr.) - A cold and brutal tyrant, without an ounce of mercy or care for any lesser being, he considers himself the true "King of the Road."
 * Menasor (Frank Welker)- the ultimate Decepticon weapon. His mind was designed to merge together the psyches of the five Stunticons who compose his form, but the great depth of loathing the four limb components feel towards Motormaster,
 * Predacons
 * Predaking (Brad Garrett) - the ferocious fusion of all five of the Predacons: Divebomb, Headstrong, Rampage, Tantrum, and team leader Razorclaw. Predaking is highly unusual, perhaps even unique, among combiners by the successful fusion of each of his component elements' physical abilities and personalities.