Sierra is one of the three Team GO Rocket leaders you can fight in Pokémon GO. Traditionally, to face her, you need to collect six Mysterious Components from Rocket Grunts at captured PokéStops. After you receive them, you can build a Rocket Radar to hone in on a Leader Hideout. Now, you can also do battle against them by finding them in Team Rocket balloons in the sky. You still need mysterious devices to find them.
You need to use robust and durable Pokémon when fighting Sierra. You want to use more defensive options with all-around general attacks to fight against any Pokémon Sierra throws at you.
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.