Miaouss is a Pokémon clone created by Mewtwo within the New Island cloning laboratory. Its origin stems from a genetic sample forcibly taken from Team Rocket's Meowth during the group's unauthorized intrusion into Mewtwo's facilities. Mechanical claws captured Meowth, extracted the sample, and processed it through cloning machinery to generate an identical replica.

Under Mewtwo's command, this cloned Miaouss battles its original counterpart as part of a larger conflict intended to prove cloned Pokémon's superiority. During the fight between the two Meowths, an interaction occurs. Both recognize the mutual pain inflicted by their combat, realizing that attacks from one caused identical injuries to the other due to their shared biology. This awareness leads them to voluntarily cease fighting.

Their reconciliation stands in contrast to the wider battle, contributing thematically to the narrative's conflict resolution. Following the climactic events involving Ash's sacrifice and revival, Mewtwo departs New Island with the other cloned Pokémon, but Miaouss remains behind with Team Rocket. Mewtwo subsequently reverses time and erases memories of the incident, leaving Team Rocket stranded on New Island without recollection of the clone or the events. The clone's ultimate fate after this memory alteration is not detailed. No additional appearances or development for this specific cloned Miaouss occur in other documented media.