Elf, who made him the gym leader?

“Champion Yulongdu, I heard that you challenged the Rota Gym yesterday, right?” The reporter interviewed the Johto champion Yulongdu.
“I refuse to answer.” Yulongdu said stiffly.
“It is said that you had a full-staff battle with the Rota Gym Master, and then you were shut out, right?”
“I refuse to answer.” Yulongdu said coldly.
“It is said that after the defeat, the Rota Gym Master asked you to change your online name to ‘Dodo’ for half a month. Is this true?”
“I refuse to answer.” Dodo was very unhappy.
“What do you think of the Rota Gym Leader?”
“I thought I was invincible with three Dragonite in my team, but he actually put together a temporary snow team to fight me, with four Alola Ninetales in it! What do you think? Is this something a human can do?”
“Who made him the gym leader?”
(Anime, Special, Game)
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Keywords: Pokémon, Pokémon, Pocket Monsters, Pokémon