S1·E108 Detective Sena!?

The Devil Bats are given a night cruise on a ship to relax before the game. When dinner time comes, it turns out someone has eaten their dinner. Sena is put in charge of finding out who did it. Then a blackout occurs; when power is restored, Mamori's briefcase is missing and Monta has been kidnapped. Sena sees someone running and chases after that person. It turns out that was Shin and the Ojo White knights are also on the boat. The food was eaten by Otawara, Shin caused the blackout, the briefcase was never missing, and Monta was mistaken for a circus monkey and placed in a cage.