I am Domino Domino (Japanese: ドミノ Domino), also known as 009 and Black Tulip, is an elite officer within Team Rocket. She appeared in Mewtwo Returns as its secondary antagonist. The name "Domino" is how she is commonly known within Team Rocket and a code-name; her real name is unknown. Sometime after the events of Mewtwo Strikes Back, Domino searched for traces of Mewtwo, who had escaped from the Team Rocket HQ. At some point, Team Rocket discovered Mewtwo's location at Mount Quena, and Domino was dispatched to the area, operating undercover as Cullen Calix's assistant, who wanted to study Mount Quena's water.

Domino feigned innocence when she was introduced to Ash and his friends. However, when the Team Rocket trio arrived in another attempt to steal Ash's Pikachu, Domino revealed her true identity and called for reinforcements from Team Rocket. When the support team arrived, Domino dispatched the Team Rocket trio to advance her goals. Once Team Rocket took over Mount Quena, Domino led the team in capturing the clone Pokémon and their young. Mewtwo tried to free everyone alone, but when Domino and Giovanni threatened the safety of the Pokémon living there, Mewtwo decided to flee, but it was soon captured. As Team Rocket set up a research laboratory on Mount Quena, the Pokémon living on Mount Quena rebelled and attacked Domino and her group. With the help of the Team Rocket trio, Ash saved Mewtwo. During the final confrontation, Giovanni and Domino were challenged by Mewtwo and the clone Pokémon, but Mewtwo was left seriously injured.

When Mewtwo recovered from its injuries, it wiped Domino's memory—along with the memories of Giovanni and the rest of the Team Rocket Grunts—so she could have no recollection of what transpired. She was last seen with Giovanni aboard his helicopter, with both of them confused as to why they were even there at all.