Dororo, Ninja Approaching the Shadow / Natsumi, Exploration of the Construction of the Hinata Residence
Zolulu, the assassin who considers himself Dororo's arch-enemy, traps the rest of the Keroro Platoon so they can't interfere as he engages Dororo in a duel to the death. Then Keroro tricks Natsumi into letting him "borrow" the house for a day. It's for a TV show and involves the platoon making some renovations, which Natsumi doesn't mind, until she learns the hard way that they're of the "home defense" kind! Source: crunchyroll
Aired 16/10/2010EP 336 - Dororo, Ninja Approaching the Shadow / Natsumi, Exploration of the Construction of the Hinata Residence
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)