Keroro, Leader Representative Robot Launches! / Keroro, the Moon is Luxurious
Wanting to come up with a brilliant invasion plan without interruptions, Keroro uses a cheap, discount copy robot to take his place! Later, he and the platoon fulfill the rash promise made by that robot to take the Hinata family up to the moon. Source: crunchyroll
Aired 09/10/2010EP 335 - Keroro, Leader Representative Robot Launches! / Keroro, the Moon is Luxurious
Sgt. Frog
Keroro is a frog-like alien sent from his home planet on a mission to conquer Earth. But when his cover is blown, his battalion abandons him and he ends up in the home of the Hinata family. There, he's forced to do household chores and sleep in a dark basement that was once supposedly a prison cell haunted by the ghost of an innocent girl. He even spends his free time assembling Gundam model kits. During his stay, Keroro meets up with subordinates who were also stranded during their failed invasion.
(Source: Anime News Network)