Tenkai Knights is a Japanese-Canadian anime collaboration between Studio BONES and toy company Spin Master, about a group of kids in the year 2034 who find they are able to turn themselves into robot heroes on a distant planet....Millennia ago, the peaceful cube–like planet Quarton, populated by shape–shifting living bricks, was ravaged by a war between the Corekai and the Corrupted, led by the ruthless warlord Vilius who desired to obtain all Tenkai Energy for his own purposes. However, the only ones who were strong enough to defeat him were the Tenkai Knights: Bravenwolf, Tributon, Valorn and Lydendor. Facing defeat, Vilius unleashed the mighty Tenkai Dragon, the beast was defeated by the four Knights and its fragments were scattered. These heroes were never seen again, but the Corrupted have returned more powerful than ever.
Tenkai Knights contains examples of:
The Ace: Chooki Mason is ridiculously good at everything he does (mainly sports), and everyone knows it. Many kids look up to him (while some envy him). Despite all this Chooki's a pretty modest guy.
Adorkable: Guren, often do to his earnest desire to help others and his occasional clumsiness.
All There in the Manual: As is typical with shows like these, there is often information that can be found on the official website that can be a toss up on whether it will be revealed in the show proper or remain "in the manual".
Chekhov's Gunman: Both Toxsa and Chooki make brief cameo's in episodes 1 and 2 before they are officially introduced in episode 3.
Clingy MacGuffin: The Tenkai Knight Cores' seem to work this way, since every time Ceylan tried to give the Tributon Core to Mr. White it always found it's way back into his pocket.
Color-Coded Characters: The colors of the boys civilian cloths match their Tenkai Knight armor. Guren (and Bravenwolf) is red, Ceylan (and Tributon) is blue, Chooki (and Lydendor) is yellow and Toxsa (and Valorn) is green.
The Corruption: Vilius's army is referred to as "The Corrupted", though the exact connotations have yet to be explored.
Engineered Heroics: An interesting case, Beni setup her first meeting with Guren with the ruse that he was saving her from a nasty fall in order to get close to him.
Epic Flail: Lydendor carries a weapon that's a cross between a flail and a whip.
Expy: Gen Kurai strongly resembles Sasuke with the hairstyle, clothing, personality, emo appearance (this is lampshaded by Toxsa himself), and even share the same voice actor, Yuri Lowenthal. He also works with Vilius under the guise of Tenkai Knight Dromus; and serves as The Rival and Evil Counterpart to Guren.
Fallen Hero: According to the official website, Vilius was once part of the Tenkai Knights himself, a highly respected part of the Corekai, until his greed got the better of him and he was cast out. It was then that he decided to overthrow the Corekai and eventually rule the entire universe.
How Do I Shot Web?: Guren and Ceylan's first trip to Quarton as Bravenwolf and Tributon. Most notable when they're falling from a great height with no way to slow their descent, that is, until their matter of fact A.I. helper plainly states that they have Tenkai Boosters, almost to late in fact.
Hypocrite: Guardian Eurus appears to be shaping into one of these.
Ice-Cream Koan: Mr. White is full of these and is more than happy to evade the boy's questions by using them.
It Seemed Like a Good Idea at the Time: Toxsa forcing the enemy's mind reading device to take information from his mind instead of the Valorn A.I. was a clever way to prevent Granox from learning where the Dragon Cubes were being held. In hindsight however, his actions led to Vilius learning about earth.Oops...
Kid Hero: The four main boys are no older than 12-13 years old.
Mind Control: After capturing the Guardians Vilius uses corrupted Tenkai Energy to forcefully subvert their personalities and change their allegiance.
New Transfer Student: Guren. When Ceylan throws a paper airplane at him when he's introducing himself, he doesn't fail to remark the cliched-ness of the act because he's new.
Nice Guy: Guren. Despite his disagreements with his father's moving schedule, he's quick to befriend the Class Clown who paper-airplaned him while he was introducing himself to his class.
No Sense of Personal Space: Gen once got Ceylan riled up by insulting him, while talking he kept grabbing the Ceylan's arm for some weird reason. Ceylan for his part was to offended by Gen's insults to notice.
Oh Crap: The boys first response when the learn that Slyger and Granox are not only still alive after what happened during their last battle, now they both have access to Titan Modes.
Out-of-Character Moment: With Vilius in control of the evil Tenkai Dragon. Beni starts venting on Gen for losing the black key, adding that she never should have allowed him to handle the situation. Instead of snapping back Gen smiles gently, agreeing that they might have better luck going their separate ways and promptly rushes off to help the Knights.
Seemingly Profound Fool: The Corekai all marvel at the Tenkai Knights. With Beag saying they are a bunch of tactical geniuses. Unfortunately, the boys don't even understand what's going on half the time and usually win a battle by the skin of their teeth.
So Last Season: When Slyger and Granox finally return in episode 16 after a three episode absence they both display the ability to transform into Titan Mode to challenge the heroes.
Spirit Advisor: Boreas, the Guardian of the portal to Quarton in Mr. White's shop often appears before the boys as a hologram to explain the history of Quarton and advise.
The Starscream: Gen's not even being subtle around Vilius about the fact that he's just using him to get the Tenkai Dragon's power for himself.
Golden Super Mode: The Tenkai Dragon separates back into the 5 dragon cubes that merge with Bravenwolf, Tributon, Valorn, Lydendor and Dromus, allowing them to enter Phoenix Mode to defeat Vilius.
As of episode 27 Vilius takes the Dragon Cubes back, taking away Phoenix Mode, as well as uses a staff that suppresses Titan Mode, but absorbing the good dragon's Tenkai energy grants each knight new powers to match Titan Mode. They don't change size, though their armor is altered.
Workaholic: Implied with Guren's father. Instead of seemingly being distant from his son, he acts like a pretty cool dad onscreen and hasn't been seen actually working yet, but it's said that he spent the last two years working instead of paying any attention to his son and has had moved do to work three times during that period.
Year X: Averted actually. The year is clearly defined as 2034. Cars with auto-pilot and navigation seem to be the norm and the kids each have bracelet-like items that allow internet connection, but nothing else seems to be too futuristic.
You Can't Fight Fate: Ceylan at first decides that getting killed in order to protect the universe is not for him and tries to return the Tributon core to Mr. White, but the core is rather clingy and keeps ending up back in his pocket.