Sgt. Frog Episode 67: Friday Night Frights!
Episode 67 of 358 of Sgt. Frog, aired July 15, 2005, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Fuyuki takes Momoka to investigate a mysterious abandoned school that`s said to have a lot of paranormal mysteries. And then the Keroro Platoon decides to design a videogame! Source: crunchyroll