Episode 310
Tamama's invasion plan is to turn everything in the world into sweets. But then it puts Momocchi in danger! Then the Nishizawa Group actually goes bankrupt, leaving Momoka to stay with Fuyuki for awhile. Source: crunchyroll
Aired 17/04/2010EP 310 - Episode 310
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)