Sgt. Frog
Keroro, Training is OK / Koyuki, Confrontation! Midsummer's Shore
S6 E17:
A mysterious boy from space lands in the Hinata household, and he has no memory of who he is, but the answer might be surprising; the Hinata siblings and the platoon go back to Hicksville Beach for a comedy contest, but Dasonu Maso decides to enter.