Sierra, one of the three Team Rocket leaders you can battle in Pokémon Go, appears after defeating at least six Team Rocket grunts. You must acquire the grunts’ mysterious components to create a Team Rocket radar, and then you can track them down, and she has a chance to appear at PokéStops or on Team Rocket balloons while you have it equipped. You want to defeat her, and the other two leaders, to gain access to Giovanni.
Normally, at the start of the month, Sierra and the other Team Rocket leaders have their rosters swapped out for something new. However, because of COVID-19, these events have more or less been placed on hold, and trainers haven’t seen them as routinely as developer Niantic initially held these events. Niantic has said they plan to bring back these Team Rockets events for 2021. But, at the start of January 2021, these rosters have not changed yet, and there’s no hint at a new Team Rocket event coming at the start of year. While this could change, we’re expecting to see a Team Rocket event sometime in February 2021, and right now, Sierra has the same roster as she did in 2020.
The first Pokémon Sierra will use against you is Drowzee, the Psychic-type Pokémon. It’s weak to Bug, Dark, and Ghost-type Pokémon. You have several options to go against it. Your best choices include Darkrai, Tyranitar, Hydreigon, Weavile, Chandelure, Mega Houndoom, Origin Giratina, Bisharp, Mewtwo, Houndoom, and Absol.
You will face one of these three options:
- Sharpedo a Water and Dark-type
- Exeggutor a Grass and Psychic-type
- Lapras a Water and Ice-type
If Sierra uses Sharpedo or Lapras as her second option, your first option will do pretty well against them, granted it has enough health to get in a few hits. Hopefully, they’re super-effective attacks. Regardless, you don’t want to hedge all of your bets on your first Pokémon for both battles. It wouldn’t hurt to have a back-up Electric or Grass-type, but these may not do so well against Exeggutor. A good option would be to use a Fighting-type Pokémon, like Conkeldurr, Machamp, Hariyama, or a Heracross that knows megahorn.
The final Pokémon Sierra will use is one of these three options:
- Shiftry a Grass and Dark-type
- Alakazam a Psychic-type
- Houndoom a Fire and Dark-type
Given the choices here, you may want to consider using a Bug or Fighting-type Pokémon. A choice like Heracross would be excellent for Sierra’s second and third choices, especially if it knew counter and megahorn. That’d be your best option for most of her possible choices, but you can also use Chndelure, Tyranitar, Hydreigon, Gengar, Pinsir, or Absol.
Plenty of trainers have encountered Sierra and have been hit by back-to-back Lapras Pokémon, so make sure you remain wary of this combination when battling her. The recent shift could force you to rethink your strategy each time, and because of the Team Rocket balloons, Sierra will not float above you forever, waiting.