Sgt. Frog Episode 159: Keroro, Climax! Card Battle / Keroro, A Proposal to Dissolve the Platoon
Episode 159 of 358 of Sgt. Frog, aired May 5, 2007, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Keroro orders Kululu to build him a collectible card game that he can use to market and make loads of money! But, of course, he has to beat the whole platoon to prove how superior he is with it. And then a mysterious organization seems to have been keeping tabs on the Keroro Platoon... Source: crunchyroll