Sgt. Frog Episode 87: Keroro, Best Wishes! Happy Birthday / Moa, Moa of Mysterious Country
Episode 87 of 358 of Sgt. Frog, aired December 2, 2005, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Rather than actually telling everyone that his birthday is December 9th, Keroro decides to subtly hint his way to birthday presents. So what if no one seems to have any clue his birthday is coming up? That just means that they`re planning a surprise party, right? Source: crunchyroll