Pokémon Go is celebrating Halloween with its first Gen 3 additions

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Pokémon Go is holding another Halloween event, and this time it’s bringing in some new creatures to help celebrate the holiday.

Niantic announced that Pokémon from the franchise’s third generation (often called Gen 3 by fans) are coming to the game for the first time as part of the event, which will run from October 20 to November 3. Specifically, this will add the ghost Pokémon Sableye and Banette. Other Gen 3 Pokémon will start appearing “as early as December.”

Pokémon Go has been a huge hit since launching in 2016. Although it’s not the headline-grabbing game it was during its first year, the app has still claimed 752 million total downloads and has earned $1.2 billion in revenue. Special events and new Pokémon can keep current players engaged and bring back lapsed ones.

The event will also make a Witch-costumed Pikachu available for capture. All in-game candy rewards (which you use to power-up your Pokémon) will be doubled during the event.

Gen 3 Pokémon first appeared in the Ruby and Sapphire editions of the series, which came out for the Game Boy Advance in 2003.