The ninety-ninth episode and the starter of the eighth and final season of Hollywood World.
Kyubey finds magical potential in Iris, so he disguises himself as Axew while the real Axew is trapped in a cage in the land of Magica. However, his cover is blown in the middle of a Pokemon battle with Teresa when "Axew" doesn't use any moves. Kyubey then insists that becoming a magical girl is the only way Iris can save Axew, but she ignores him and sets off with her Pokemon to save Axew.
Emolga (Iris's; debut)
Empoleon (Courtney's; flashback)