Sgt. Frog Episode 93: Natsumi delves into the Secret Basement! / Hinata Aki, probably the Strongest Woman in Space
Episode 93 of 358 of Sgt. Frog, aired January 20, 2006, 25 minutes. Available with English subtitles and dub where released.
Episode summary
In order to provide a dangerous combat training scenario for his men, Keroro steals Natsumi`s precious 623 autograph and tells her she has to infiltrate the secret base to retrieve it. But are they really prepared for Natsumi at 62.3% over her normal combat strength? Source: crunchyroll