Niantic has confirmed that Gen 3 Pokemon will be coming to "Pokemon GO" and will debut in the game's upcoming Halloween event which starts Friday, October 20. They have confirmed a number of ghost-type monsters from Gen 3, including Sableye and Benette, among other creatures originally spotted in the Hoenn Region. A report by Venture Beat sheds a lot of additional light on what comes next.

What about the rest of Gen 3 Pokemon?

Many speculate that the Gen 3 roster [VIDEO] will not be seen all at once, but rather gradually starting off with the collection's Ghost-type Pokemon in time for the Halloween event. The entire Gen 3 collection consists of a hundred creatures so the ones to be featured in the upcoming event are only a fraction of that.

Niantic adds that the rest of Gen 3 will gradually appear beginning December.

The inclusion of Gen 3 Pokemon was initially leaked earlier this week when a data mine discovered the sounds for creatures up to No. 386. The number corresponds to Deoxys, who is the last Pokemon included in the Gen 3 collection, which was originally introduced in "Pokemon Ruby and Sapphire" for the Gameboy Advance in 2002.

Niantic recently added Mewtwo along with the three Jhotto legendary Pokemon but has yet to entirely add both the Gen 1 and Gen 2 Pokemon roster. A few notable creatures missing in the game are Celebi, Mew, Ho-Oh, Smeargle, and Delibird.

Other things to expect in the Halloween 2017 event

This year's installment of the annual Halloween event of "Pokemon GO" is expected to feature a witch hat-wearing Pikachu.

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The All Hallows' Eve counterpart of Santa hat Pikachu, Ash hat Pikachu, and Party hat Pikachu. The spawn of Ghost-type Pokemon such as Gastly, Misdreavus, and Cubone is also anticipated to increase, while double candy will be rewarded for all transfers, catches, and hatches. Special boxes containing items such as Raid Passes and Super Incubators will also be up for grabs, and the buddy Pokemon is supposed to find candy twice as fast. A Mimikyu's disguise hat will also appear on the avatar.

The "Pokemon GO" Halloween 2017 event will run from October 20 to November 2. Other events are currently going on in the game as well. Players can share the best AR photo taken in-game until October 25 for a chance to win prizes. The three legendary dogs Entei, Raikou, and Suicune can also be seen in new regions until October 31.

The game was launched in 2016 and was an instant hit. In its first year, the game earned $1.2 billion in revenue and 752 million downloads. It is available for Andriod and iOs devices.