To find Fortbyte number 53 of the decryption challenge, head for the secret mountain base that served as the super villains headquarters during season 4. This is where the rocket took off from at the end of the fourth season.
On the lowest floor of the base, you will find a faceted ball with two platforms. You just have to stand on one platform and dance to activate it. If two players dance simultaneously on both platforms long enough, the faceted ball will be activated and the Fortbyte will become collectible.
