This is episode 0, the prequel to the main Keroro Gunsou anime series. KeroZero was shown in theaters with Keroro Gunsou Movie 4.
Spinning
Bugged
Living Room
Smart Talk with Raisin
The Simpsons in Plusaversary
Voyager
Rita and Crocodile
Des trésors plein ma poche
The Moon Bird
Pikachu's PikaBoo