All three Team GO Rocket Leaders return to for February 2025, including Sierra, with a new look team for trainers to challenge.
After Team GO Rocket took over last month as part of the special Fashion Week: Taken Over event, they continue to cause problems, appearing at PokeStops and in Rocket Balloons.
While not as tough as Boss Giovanni, Sierra still provides one of the hardest tests in. To beat her in February 2025, you must set up a team that counters her lineup by using Pokémon that are super-effective.
After defeating six grunts, you can take on any of the three Team Go Rocket Leaders, including Sierra. Four changes have been made to Sierra's lineup from January 2025, including her lead Pokémon.
For February, she will always lead with Poison- and Bug-type Skorupi. It shouldn't provide too many problems for trainers, but her next two selections might.