Sgt. Frog Episode 114: Giroro - My Way of Getting Revenge! / Keroro - Dasonu Maso Again and Again and Again?
Episode 114 of 358 of Sgt. Frog, aired June 16, 2006, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Giroro helps two young aliens help themselves when they come to Earth seeking vengeance for their father. Then, Dasonu☆Maso`s younger sister, Dasonu☆Marie, studies comedy by observing the masters, the Keroro platoon! Source: crunchyroll