Brush Your Teeth! Beef, Runaway Cavities!
Nejiru and Chigiru enjoy all-you-can-eat ice cream, and end up with terrible cavities. Miraculously, they just happen to receive a flyer from a dentist's office the next day. But when they arrive at the "Dental Cattlinic" run by Dentaurus, they get drawn into an adventure involving shady scams, miniaturized drill tanks, and tooth-dwelling alien invaders! Source: crunchyroll
Aired 14/05/2017EP 33 - Brush Your Teeth! Beef, Runaway Cavities!
2016
Heybot!
The anime takes place on the screw-shaped island country of Screw Island and follows the "Vocabot" Heybot and his partner, Prince Nejiru as they collect different "Vocab Screws". When the Vocabots wear the Vocab Screws on their heads, they're able to compete in "Vocab Battles," battles for who can think up and tell the best jokes.
(Source: Anime News Network)