We saw him in Lusamine's wedding photo, and Gladion talked about him with Lillie in the most recent episode. His story in the anime is that he died in an accident while researching Ultra Wormholes. Gladion was too young at the time to know all the details, and Lillie is too young to remember him at all, but they assume that he's dead instead of just missing like in the games.
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DaRedGuy
Jan 20, 2019 at 07:16AM EST
Rad Dudesman
Jan 20, 2019 at 11:13PM EST in reply to