Twin Princes is the 138th episode of the Katekyo Hitman Reborn! anime.
Rasiel is revealed to be one of the Six Funeral Wreaths. Belphegor, Fran, Olgert, and Rasiel release their Box Weapons for battle. Sil's Box Weapon is revealed to be Pipistrello Tempesta with the ability to fire invisible sonar waves enchanted with storm flames; the storm flames when in contact with something cause an explosion. Bel and Fran are defeated. Olgert sends his Elefante Forte Pioggia and destroys the castle the Varia invaded. In the remains of the castle, an unharmed Xanxus is seen sitting on his throne and drinking wine.