Keroro, Clash, Star Circular Violence Tool Tournament / Keroro, My Super Decisive Plan!?
Saburo and Keroro bet the Earth on whether the human or the frog team can win a bowling match! And then Keroro's dismayed by his platoon's lack of enthusiasm about the regular invasion meeting, so he turns into a giant monster to go on a rampage. Source: crunchyroll
Aired 02/10/2010EP 334 - Keroro, Clash, Star Circular Violence Tool Tournament / Keroro, My Super Decisive Plan!?
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)