Kane (wrestler)

The Brother of Destruction
A demonic wrestler, also the mayor of a city to great success.

Season 4
Brendan Fraser turned into The Demon of Debt after being attached with Kane's mask.

Season 0
Kane is the owner of Regigigas, as he is one of his Pokémon.

Episode 5

Nemesis, another of his Pokémon, fights against a familiar opponent.

Episode 8

Captures Potemkin and adds him to his team.

The Dark Web Rumble
Some people rumor that he survived the ordeal of his own self-sacrifice, and reclaimed Regigigas, making a vow to never appear on-camera ever again to not have to meet Red protecting her from facing danger, as is his duty as a Pokémon master.

Trivia

 * Appeared in a match with Regigigas, possibly confirming being his trainer.
 * Later confirmed in Season 00.