Celosia debuted in the anime in From A to Z!. She was first seen leading a group of Team Flare Grunts to recapture the Zygarde Core that had escaped from Lysandre Labs. She managed to find the Zygarde Core, but thanks to Ash, his friends, and Sawyer's interference, she was unable to retrieve it. When she later informed Xerosic of what had happened, she was told that Bryony had been tasked with capturing the Coreas well. During the following night, Celosia led yet another group of Grunts in an attempt to capture the Core, but with Ash and Sawyer covering Serena, Clemont, and Bonnie's retreat, she was once again unsuccessful.
She reappeared in Meeting at Terminus Cave!, teaming up with Bryony to retrieve Squishy in Terminus Cave. After a prolonged struggle, during which Team Rocket interfered as well, Team Flare was forced to retreat, as they were unable to defeat Ash's Greninja and Squishy had fled. In the next episode, she, along with Bryony and several Grunts, monitored sensors to find Squishy. Celosia and Bryony also ordered two Grunts to watch Ash and his friends. Later, the sensors caught energy waves coming from Squishy and Z2and managed to determine Squishy's location. They, however, were unable to make it in time and lost sight of Squishy, as it had stopped emitting energy waves. Celosia and Bryony then ordered the pursuit squad to withdraw, as they thought Squishy probably wouldn't return to Ash and his friends, and decided to narrow their search.