Keroro, Invader's Aura / Dororon? Tamama-kun
A Keronian named Orara, with an amazing invasion aura, comes to stay! And then, Tamama gets stuck to Dororo after accidentally breaking Keroro's precious toy. Source: crunchyroll
Aired 15/01/2011EP 347 - Keroro, Invader's Aura / Dororon? Tamama-kun

2004
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)