Big Bad: Alongside Kalus until the Red Sentients show up, at which point he kind of gets fazed out.
Brain Washed: He got reprogrammed by the Green Sark, causing him to mindlessly worship the Alpha-Code.
Determinator: Of all the evil faction leaders, Zemerik has worked the hardest, defeating his old master, building his own empire, and continuing to survive and move even when his empire crumbles and his former master wants him dead.
Evil Sounds Deep: When he still served Krytus, his voice was considerably deeper.
Heel-Face Revolving Door: Definitely. At first he's a Krytus's slave, then he gains freewill, turns on his master and becomes his own villain. Then when Krytus is released, he assists Vert, and even saves him at the cost of his own safety. He bargains with the team to get them information, and then later tells them of Tezz. When he tries to make more Zurk, he tricks the team and turns on them. After that, he's possessed by the Alpha code, but Spinner breaks him out of it using a handshake that symbolized their alliance, and he defeats Zorax and frees them, before trying to sell them off to Karmordians.
Until Krytus catches up with him in Get Zemerik. Krytus kills him but he's last seen reviving under the control of the Alpha-Code.
Not So Stoic: Usually, Zemerik is smug and dispassionate, but he tends to lose his temper upon defeat.
Pet the Dog: First Season Finale, he sacrifices his only chance of escape to stop Krytus. Later on, when Zug gives Zemerik his powercore, so he can survive the wasteland Zemerik promises to come back for him, calling him "[his] friend."
Ungrateful Bastard: Averted but only in proportionate amounts. The team sticks around to save him from Krytus, and in return he stops Krytus from killing them at the cost of his own safety. They rescue him from The Vandals, and in return he tells them about Krytus and his minions before pulling a Villain Exit Stage Left, and later alerts them to a rebel fighting against Krytus. When they help him recode Sark, he does turn on them and reveal his ambitions to take over the multiverse, but he also extends a hand to them in a We Can Rule Together sort of way. When Spinner frees him from the Alpha code, he frees them from Zarvox, and then sells them off to the Karmordians.
Whip It Good: His main weapon, and his car's, is an energy whip.
Taking the Bullet: During their alliance in the Season 2 Finale, A Zurk, takes a Vandal Spear into his car to protect Zoom before driving off. Zoom remarks that it saved him.
Took a Level in Badass: When the cold battle Zone upgrades Zemerik's intelligence, he has two Zurk combine their vehicles into a Sark Tangler, this minion proved far more efficient than the norm. Though in the end, it had to disassemble the Tangler and the other Zurk cars to make a bridge.
Took a Level in Badass: After being defeated by Grimian, his response is to upgrade his ride and take one of these. Afterwards, he's even a match for Krytus in hand to hand combat, something even Vert had extreme difficulty doing.
Second-in-command to Captain Kalus until Season 2.
Undying Loyalty: While he had some rather traitorous moments, he eventually falls under Kalus firmly. In Grimian's secret, his incompetence loses Kalus's favor, but after outing Grimian as the traitor, and firebombing Grimian's car to stop the ape's escape, he wins Kalus back (bar some comedic anger at the end of the episode).
Hatch: "You were magnificent Captain Kalus!"
Kalus: "Hm, and your loyalty was noted... sorcerer."
Failure Is the Only Option: Grimian would never achieve his goal of leading the Vandals. Kalus would defeat him, and even if he did win, his ally Krytus would turn on him and kill him. Even when he's winning, Krytus's musings always allude to the fact that Grimian will never truly rule.
Public Execution: After his final attempt to conquer Vandal results in them nearly being wiped out by the Red Sentients, the final shot of him is him surrounded by the entire Vandal Horde, Kalus slowly approaching him with a spear in hand, heavily implying he's about to be executed for what he's done in front of the entire planet.
Human Popsicle: Krytus's ultimate fate after the other Red Sentients reveal that they're just as tired of the war he started as the Blue Sentients are, the two races banishing and freezing him in ice for his crimes, and in the Season 3 premiere it's revealed that the others were frozen next to him.
Hoist by His Own Petard: He frees the rest of the Red Sentient civilization from statis...only for it to turn out they're just as tired of his war as the Blue Sentients are and turn on him, helping banish and imprison him in ice.
This Cannot Be!: Pretty much his reaction when Battle Force 5 awakens the dormant Blue Sentients.
Villainous Breakdown: Turns out one of these tipped Sage off to the true evil of her brother in ancient times.
Has another in Get Zemerik when an Alpha Code brainwashed Zemerik forgives him after Krytus finally mortally wounded him, effectively making Krytus' revenge on him meaningless. Krytus responds with disbelief, followed by a furious Big "NO!" and a fit of rage ending with him throwing Zemerik's body into a pit.
Apologetic Attacker: a bizarre example, in "Warrior Fire' he and Kytren have to rescue Kyburi, he insults Kytren, purposefully hyping him up for the fight, which they later win. As they are getting away, he explains his actions to Kytren, who agrees with him.
Conservation of Ninjutsu: The First bordered on Implacable man, even after losing most of his limbs he unleashes his bomb. The next three prove very powerful, and have the Team on the ropes. When they get into an army though, they quickly are reduced to Mooks. The Team is able to take on multiple foes at once and take them down.
Suicide Attack: The first one appearing is one. He unleashes a shadow bomb into the portal Nexus to free his masters.
The Ancient Ones
Big Bad: If Rawkus' monolouge about them at the end of season 2 is any indication, they'll be this in season 3.