After completing Starter Island, you will be sent over to one of two labs, depending on the region you pick.
Kanto
Professor Oak requesting you to pick a starter.
If you decide to start your adventure in Kanto, you will be sent to Professor Oak's lab. In Professor Oak's lab, you will be able to choose from one of the three starters, which are:
Battle Test
After choosing your starter, Professor Oak's aid will challenge you to battle with him to know how battles works after you leave his lab to head to Pallet Town. His pokemon has no damaging moves for first contact battles purposes.
Scientist Oak's Aid
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Johto
Professor Elm requesting you to pick a starter.
If you decide to start your adventure in Johto, you will be sent to Professor Elm's lab. In Professor Elm's lab, you will be able to choose from one of the three starters, which are:
