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Upon returning to the center I located a familiar man in a gentleman's outfit. I recognized him from the SS Anne and was worried he would, too. He was the Global Police agent. However, he thankfully must have not put two and two together that I was the one who sank said ship. He said that he saw my battles against Erika and Surge and thought I would be good to trust.
"You see," he said, "I have deduced that Team Rocket's headquarters are in this very city."
"Really? That would explain them running around like they own the town. I'm guessing they really do"
He informed me that the headquarters were in Celadon's game corner, but he wasn't sure where in the game corner they were. To be fair, it should've been obvious who ran the ROCKET game corner, and I felt like an idiot for not putting two and two together sooner. Anyway, I bid him farewell and head out to the game corner.
(by the way, none of that actually happens in-game, for those of you who don't know pokemon. I just felt like adding onto my previous theory/revelation that Looker was in Kanto)