Cubot

Cubot is one of Dr. Eggmans assistant robots next to Orbot. Cubot isn't as intelligent as his friend Orbot and his voice chip tends to malfunction. Eggman always tries to fix it but no luck. He was last seen with Orbot stranded in space after Eggman went for the Time Eater. He, along with Orbot are set to reappear in the next Sonic game Sonic Lost World where Eggman somehow escaped from White Space and reunited with his bumbling 3D shaped henchmen.

Sonic Lost World
After the Deadly Six rebel against Eggman (thanks to Sonic getting rid of a conch shell that he was using to keep them in line), Cubot loses his body, leaving him nothing more than a still-functioning head (who reverts to talking like a pirate yet again), though Tails fixes his voice after the group returns to Eggman's base.

Later on, Orbot complains that he got tired of carrying Cubot's head, and builds him a snowman's body. Cubot complains that he can't feel his legs (despite not even having any in his original form). However, Tails decides to help by attaching his head on a Crabmeat's body, which proves to be a mistake as the Badnik was controlled by the Zeti, thus turning Cubot evil. Eggman saves Tails from Cubot, who ends up decapitated again by Sonic (he then apologizes, saying he "suddenly felt very mean".)

After Tails was captured by the Deadly Six and Sonic discovers from Zavok what they plan to do, Cubot is revealed to now be permanently attached to Orbot's body by Eggman, the latter who finds it irritating.

In Lava Mountain, the super-powered Deadly Six attack Sonic, Eggman and Orbot/Cubot. The latter three plummet to their (supposed) deaths, but Eggman rescues the bots during his faked death.

After the end credits, Orbot and Cubot discover Eggman stuck in the dirt and get him out, but Cubot sees that half of Eggman's mustache is torn off. Orbot shuts him up, preferring that Eggman detaches his head so that Cubot will get the blame ("glory" as Orbot explains) on telling him about his mustache.

Cubot was repaired after the game's events, as seen in the Sonic Boom TV series.

Trivia

 * He bears some similarities to Bocoe as both are yellow tall robots who are partnered up with a shorter robot and act as minions to Dr. Eggman.