Pokemon Legends: Arceus - Who Is Ingo?

thegamer.com:

In Pokemon Legends: Arceus, you find yourself transported to the vast lands of Hisui many years in the past. In Hisui, you’re introduced to many characters, including the people residing in Jubilife Village and the opposing Diamond and Pearl Clans who worship two versions of the Almighty Sinnoh.

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One Pearl Clan member you have a similarity with is Ingo, who also found himself in Hisui after arriving there from the future, minus his memories. Ingo is a mysterious yet familiar face whose backstory is one of the more intriguing ones in the game, as you’ll see through your interactions with him.

If you’re a fan of Generation 5, you might have immediately recognized Ingo in Legends: Arceus, thanks to his conductor outfit and pose. He plays a small role in Pokemon Black and White and their sequels as he and his twin brother, Emmet, are Subway Bosses in the Battle Subway located in Nimbasa City.

Ingo will challenge you to a Pokemon battle after you win 21 times in a row at the Battle Subway, then again after 48 wins with an even stronger team.

Similar to the player character, Ingo most likely found himself in Hisui by unwittingly travelling through a space-time rift - a distortion in space and time. Dialogue at the end of the game suggests that Volo was the cause of these rifts, opened in his quest to find Arceus. However, Ingo arrived in Hisui a few years prior to the events of the game.

While Arceus most likely sent the player character to Hisui from his realm to stop Volo from wreaking havoc on the land, the game doesn’t explain why or if Ingo was sent to Hisui intentionally.

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Perhaps Arceus sent