Professor Elm is the resident Pokemon Professor of New Bark Town in the Johto region and a close friend and colleague of Professor Oak. He lets AJ choose his first Pokemon in Gen 2 (Pokemon Crystal), and Aoooo do the same in Gen 4.5 (Randomized HeartGold), and also gives both of them the egg that was obtained from Mr. Pokemon, which later hatched into Prince Omelette for AJ and Elsa for Aoooo.

He is also known as Dr Wujisu in Vietnamese Crystal due to the poor translation job and is thought to have kidnapped Baba and abused her to the point where her maturity has been stunted and she has developed hyper-sexuality.

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