Greninja, Lucario, and Regigigas VS ???

Lucario Greninja and Regigigas VS ??? is a 3 on 3 What If? Death Battle, featuring Regigigas, Greninja, and Lucario against a mysterious team of opponents. It is the 23rd episode of QuasimodoBellringer's first season.

Description
Pokemon VS ???. Who will emerge supreme in this triple battle to the finish?