An alien named Zixx Phunkee-Zee and her partner Flanngo crash land on Earth while investigating a lead on behalf of The Network. Once there they discover that the planet isn't as insignificant as it seems. For one thing, it's home to an ancient pocket dimension maze known as The Keep, which just so happens to operate a lot like an Earth video game. It's also where the evil Hargokk Empire is planning its return. Led by Deeth, they seek to resurrect the evil alien warlord Oncolon from deep within The Keep and take over the universe.
Fortunately for Zixx and Flanngo, they receive help from local human children in investigating the secrets of The Keep and fighting off Deeth and his cronies. Best friends Adam and Griff help the duo in Level One, later being swapped out for Riley, Megan, and Dwayne in Level Two and Level Three.
Despite never gaining a huge audience, it's a source of nostalgia for many Canadian kids of that era and is notable for managing to wrap up its main plot threads by the end of its final season.
Zixx Contains examples of
- Aborted Arc: Anything involving Adam's mom's disappearance and what connections she may have to the alien activities he's involved in are dropped in season 2, since he and Griff were left behind.
- Adults Are Useless: Neither Murray (Adam's Uncle) from season 1, Megan's mom from season 2, or Dewey (Dwayne's dad) from season 3 learns about their mission, even though strange things happen around them.
- A.I. Breaker: In the season 2 finale. Sirenelle is a computer built with perfect logic to play Bognorian Chess. So Jayda comes at her illogically by just walking directly at her. Sirenelle cannot comprehend it and is defeated.
- Aliens Speaking English: All of the aliens on the show speak English.
- Always Identical Twins: Although they are not seen together at the same time, Merle is Earl's identical twin brother.
- And the Adventure Continues: In the finale Oncalon is defeated and the alien members of the team are headed back home. But Zixx tells the humans that the Network will probably call on them all again after demonstrating how well they work together. The last moments also see Zixx, Tarphex, and Flanngo being sent straight to another world by the Network to deal with some of Oncalon's friends.
- Art Shift: The sequences that happen in The Keep are rendered in CGI, while the real world scenes are in filmed in Live Action.
- Big Bad: Deeth for the first season, and Jayda for the second.
- Big Brother Instinct: Despite being cousins instead of siblings, Riley is like this to Megan.
- Body Snatcher: Thar has the ability to take over another person's body and control them, which he did to various characters, such as Dwayne and Amy.
- Color-Coded for Your Convenience: The main character's Keep forms manage to be unique models, but in the midst of the action the best way to tell characters apart is the color of their armor.
- On Level One, Zixx is predominantly lavender and purple, Adam is yellow, and Griff is black with purple highlights. Flanngo is green and blue, but the fact that he's a lizard means it's not as important to note.
- On Level Two Zixx and Flanngo have the same colors. Newcomers Riley, Megan, and Dwayne are blue, green, and orange respectively.
- On Level Three, Tarphex is red and white while Amy is pink.
- Throughout the series, anyone associated with the Hargokks are predominantly red and black.
- Deadpan Snarker: Flanngo is this, though Zixx has her moments as well.Zixx :*After her, Riley, Megan, Tarphex, and Flanngo became stranded over an abyss* O.K, who's had enough relaxing now?
- Death Seeker: Sirenelle, the guardian of Level 2, is trapped in that position until someone beats her and takes her place.
- Fake Defector: When Jayda manipulates Riley into stealing the Rod of Lethor and making out Zixx to be the real villain, Riley initially seems to have fully bought into her lies. Only once he actually gets the Rod away from Jayda does he turn on her and reveal he was aware she was trying to manipulate him the whole time.
- Fluffy the Terrible: Earl's dog Dickenson, who's actually an alien who takes on a much larger form in The Keep.
- Humanoid Aliens: Any alien that appears on Earth is like this, though their Keep forms don't necessarily match up.
- Jerk with a Heart of Gold: Flanngo. He tends to criticize the humans, but shows he cares, as shown by how he spoke up for Megan when she lost the Sword Replica.
- Jumped at the Call: Once Dwayne finds out about the keep, he wants to be on the team.
- New Season, New Name: Each season upped the level number to match the season, thus ''Level
- Orcus on His Throne: Oncalon has to spend most of the series in a healing tank due to grievous, life-threatening injuries he sustained before the show started. In his stead he sends his various lieutenants to do his dirty work until he's regenerated.
- Put on the Bus: Griff after season 1. Adam appears in one episode in season 2, but then is put on the bus as well.
- Teeth-Clenched Teamwork: Riley and Tarphex do not work well together when they first meet.
- Voluntary Shapeshifting: Markko. He shapeshifts to appear to other characters, causing confusion.
- Wake Up, Go to School, Save the World: Main characters have to miss missions due to other commitments, as would happen when trying to hide the fact you’re saving the world.
- You Kill It, You Bought It: Jayda's ultimate fate. She defeats Sirenelle, the guardian of Level Two, but because she's the first person to do so she is stuck in the same position while Sirenelle is freed.