Pokémon, who made him the gym leader?

"Champion Yulongdu, we heard you challenged the Rota Dojo yesterday?" the reporter asked Yulongdu, the champion of Johto.
"I refuse to answer," Yulongdu said curtly.
"I heard you had a full-team battle against the Rota City Gym Leader, and you got shut out, right?"
"I refuse to answer," said Yu Longdu coldly.
"It's said that after your defeat, the Gym Leader of Rota City asked you to change your online name to 'Dodo' for half a month. Is this true?"
"I refuse to answer," the dodo said, clearly annoyed.
What is your opinion of the Gym Leader of Rota Dojo?
"I thought I was invincible with three Dragonite in my team, but he just randomly assembled a snow team to beat me, and crammed in four Alolan Ninetales! What the hell?! Is this something a human could do?"
"Who exactly made him the gym leader?"
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Dojo owners' communication group (anyone can apply)
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Keywords: Pokémon, Pocket Monsters, Pocket Monsters