Sgt. Frog Episode 113: Keroro - Battling Our Wettol King / Natsumi - Returning Home to a Wettol King
Episode 113 of 358 of Sgt. Frog, aired June 9, 2006, 25 minutes. Available with English subtitles and dub where released.
Episode summary
After Keroro discovers that Natsumi is terrified of slugs, he has Kululu super-evolve one into a heroic-type humanoid, Wettle King. The faux hero takes on the repulsed Natsumi, but Fuyuki may turn out to be a tougher enemy. Later, Kululu soups up his creation even more, turning him into the more powerful Giant Wettle King, able to take down Natsumi and anyone who sticks up for her. Except, what happens when Wettle King truly starts to become heroic? Source: crunchyroll