As the series goes on, he proves to be highly competent with a strict form of honor, though he is somewhat irreverent and is perfectly willing to bend the law.
He slowly becomes fanatical, becoming convinced that he must make Cybertron completely organic, resulting in him and Cheetor coming into conflict multiple times.
Rhinox (voiced by Richard Newman) is the tech expert of the Axalon crew, close friend of Optimus, and the second-in-command whose beast mode is a rhinoceros.
In Beast Machines, Rattrap is unable to transform after being reformatted for several episodes due to his frantic nature; when he does, he finds his body is far weaker, resulting in him developing insecurities over his perceived uselessness and his teammates' anger at him.
Dinobot's abrasive personality often leads to conflict with the other Maximals, particularly Rattrap; the two develop a strange cross between a rivalry and a friendship, often arguing with each other.
After discovering the Golden Disks, Dinobot begins to wonder if the future can be changed or is set in stone, triggering an existential crisis that leads to him betraying the Maximals to Megatron temporarily.
His reluctance to ever hurt a female leads him to refuse fighting Blackarachnia; eventually, the two develop a romance and fall in love.
Depth Charge (voiced by David Sobolov) is a former security officer turned vigilante whose beast mode is a manta ray.
He operates independently to hunt down and properly execute the criminal turned Predacon, Rampage, who had killed everyone in the colony Depth Charge had been assigned to protect.
Depth Charge often works separately from the other Maximals and clashes with them, instead concentrating on hunting Rampage, though he often does wind up appearing to aid in the middle of a battle.
Megatron's original beast mode is a purple Tyrannosaurus but he later upgrades into a red European dragon after stealing his namesake's spark.
Waspinator (voiced by Scott McNeil) is a dim-witted aerial fighter and comic relief who is often abused by both his fellow Predacons and the Maximals.
Terrorsaur (voiced by Doug Parker) is an ambitious and power-hungry aerial fighter who openly wishes to usurp Megatron as leader of the Predacons.
Blackarachnia's selfishness and desire to preserve her own life ironically placed her on the side of the Maximals, as she was unwilling to sacrifice her existence for Megatron's ambition.
In Beast Machines, Blackarachnia is a full Maximal, but still retains some bad-girl traits, and spends much of the show trying to find and get Silverbolt back, and then has to help him get over what he did as Jetstorm.
Inferno (voiced by Jim Byrnes) was a blank protoform who received damage landing on Earth gaining the beast mode of a fire ant, and went insane, gaining the mentality of the actual animal tied in with his beast mode: aggressive, obedient, and loyal to the colony (his stasis pod), as well as making him violent and homicidal.
Quickstrike (voiced by Colin Murdoch) is an aggressive and highly violent sociopath who is obsessed with fighting and speaks with a Texan accent.
In the series finale, Quickstrike and Inferno are killed when they are caught in the crossfire of the Nemesis when Megatron has it blast the primitive humans' settlement.
Rampage/Protoform X (voiced by Campbell Lane) was created by a Maximal experiment to recreate Starscream’s immortal spark; while he became nigh invulnerable, he was also left in constant pain, driving him insane and causing him to become a violent serial killer.
Megatron finds his unconscious body and tears out half of his spark, using it to keep him under his control after throwing him in the Restoration Chamber and renames him Rampage.
In "Transmutate", a more sympathetic side of Rampage is shown when he meets the titular character, a deformed and simpleminded Transformer, befriending it and talking Megatron out of executing it and into allowing it to join the Predacons.
The two battle once again; ultimately, a cackling Rampage allows Depth Charge to impale him with a shard of raw energon, causing a massive explosion that kills them both.
However, in the Beast Wars finale, the death of Rampage causes him to retake the personality of the original Dinobot and rebel against Megatron, saving the Maximals and the future.
When Optimus Primal reformats him, Nightscream takes on this name and gains abilities in his transformed state where he can fly and drain energy from Vehicon drones.
After being abandoned by Megatron's spark, the creature continued to live in an animal-like state, forming a bond with Nightscream, similar to that of a boy and his dog.
Jetstorm (voiced by Brian Drummond) is a psychopathic Vehicon general who transforms into a fighter jet and commands the Aero Drones that are modeled after him.
Thrust (voiced by Jim Byrnes) is a suave Vehicon general who transforms into a motorcycle and commands the Cycle Drones that are modeled after him.
Although reputed and proven to be the most intelligent military tacticians in history, Obsidian and Strika had limited moral judgement and were absolutely obedient to whoever is in power, thus making them allied to Megatron, who had successfully taken over Cybertron at the time.
The Mole Drones are large, autonomous drilling machines that are used by the vehicons for digging purposes and are not genuine transformers with robot modes.
The Diagnostic Drones (voiced by Paul Dobson and Christopher Gaze) are small, hovering robots built to assist transformers in various tasks and appear in the show as servants of Megatron.