Dr. K creates The Ultimate Robot, Cubix's major adversary in Season 2. When The UR absorbs the powers of other robots and shape-shifts into look-alikes of them, Cubix is initially blamed for the damage he leaves behind.

To rid Bubble Town of its rodent problem, Cubix, Connor, and a smelly Exterminator Robot shrink down to invade a mouse colony, but wind up face to face with a cat who's a rat - and at the mercy of the big feet of Chip, Mong, and Abby - who can't see them!

The kids and Cubix befriend a bunch of invulnerable Crash-Test Dummy Robots, but when the Dummies turn on them, the question becomes 'How do you defeat an enemy you can't possibly hurt?'

Chip is little to do anything so he decides to build a robot called the Chipinator so he can do everything that only tall guys can do! He finds some robotic armour at the junkyard and some robotic head but soon, Chip becomes insane and attacks Bubble Town! It's up to the Botties to stop him!

It's time for the annual Tricoball competition - and the underdog Botties Pit team shocks everyone by taking on the dinosaur robots from the all-new Jurrasix line. But Cubix and gang will need more than teamwork to win once Dark Cubix shape-shifts its way into the contest as Tyrannosaurix - who is set on making Cubix extinct.

There's a spoilsport in Bubble Town's robot-kite flying contest: jealous Antonio, the new hovering Weather-Control Robot, who feels the skies belong to him... and will defend his place with weather-attacks on Cubix and the kids.

Robix Corp is about to present its newest robots-like Demolishix, Correctix, and Endurix, a colonizer with the ability to instantly transport himself... anywhere-to the general public. But things go awry when Dark Cubix shows up and absorbs Maximix, Dondon, even Endurix and faces off with Cubix.

Dr. K manages to zap all of Bubble Town's robots into a 'community sleep' and convinces them all to aid him with his nefarious plans. The Botties figure out that the only way to revive their robots without losing them forever is to send Cubix into their bizarre dream world to find a way to wake them all up - and show Dark Cubix who's boss!

It's up to Connor, the rest of the Botties, and surprisingly Dr. K to restore Cubix, Maximix, ward off the zombot army, prevent all of Bubble Town's robots from Kilobot's evil brainwashing and beat him once and for all!

The kids find and activate the last of the Mechanical Men - Bubble Town's earliest robots - outmoded years ago by Nemo's EPU-version. But when the old clunker has trouble adjusting to the modern world, the kids add an EPU to his system. It gives him odd powers and the desire to find his beloved old master...a funny robot-loving boy who became Dr. K.

Kilobot, sick of Dr.K's shortcomings strikes out on his own and returns to Robix Corp to steal the tools necessary for world domination that K failed to obtain. But it's not as easy as he thought it would be and he is forced to impersonate Maximix to get the job done.

Dr. K sends his army of zombots to Bubble Town to attack- but shortly thereafter they attack him. Kilobot has his own plans- plans that don't include Dr. K. Now it's all out war as Maximix sacrifices himself and Cubix's cubes get disseminated amongst the Zombot army.