Professor Oak's immediately.

Professor Oak put a Pocky stick in his mouth and looked over the new Pokemon. "How very interesting. Karen Oak is now a Dryad. Misty is some girl whose bike you stole and is now a Genie. You've managed to capture an Officer Jenny, a Nurse Joy, a Growlithe and a Chansey. You've also managed to evolve your Pikachu into something other than a Raichu. Ash, my boy, you've right buggered up your training journey in just under six hours."

"I noticed," said Ash.

"Let's see. The Genie is Fire/Thunder. Dryad is Plant apparently. Jenny registers as a Fighting type. Joy is a Egg type. The Growlithe and Chansey are normal specimens and Pikachu's new form is Electric type but with Fighting or Dark added. I'm getting some odd readings so I'm guessing she's not stabilized."

Pikachu just continued to read an article on The Care & Feeding Of Pikachu's in "Pokemon Monthly" - she apparently thought it was hilarious.

"Well, I can talk to the pokemon," began Ash.

"You can chatter with a Chansey? Talk with a Tauros? Mutter with a Mime?"

"Please don't start that again, Professor." Ash didn't want to hear that song the first time.

"Sorry Ash," said the not sorry at all Professor. "In any case you'll have to take your pokemon with you."

"What?! I thought they could stay here!" Ash wasn't looking forward to this at all.

"I've communicated the findings to the local Officer Jenny and sent them on to the pokecenters so that they know you'll have interesting pokemon to take care of, but when I sent the messages on to a few Gym Leaders I received a mysterious reply that I should keep quiet about it if I know what's good for me," said the Professor. The usual humorous facade dropped away. "I do not appreciate threats but this is not the most secure of locations. If someone is going to be coming after you, best you not have a location they can track you down at."

"Someone's after me?" Ash asked. "Oh right. Pokethieves."

"Yes, most likely. Good luck Ash, and don't forget to rotate your stock. Keep moving. I'll have some upgraded defenses in place in about three months and you can return then." The Professor politely but firmly pushed Ash out the door.

"Now what do I do?" Ash asked Pikachu.

Pikachu took a bite out of an apple and considered.