A Professor? Attacked?

As you step through the grasses and see the beautiful Lake Verity ahead of you, Barry comes screaming past and barges in front of you. You then notice a large man, almost twice your own height, wandering around, looking very stern, trying to understand the goings on at the lake. he is wearing a large white coat and has lovely, long, silver hair and a mustache that many a grown man would envy. He turns when he hears you enter. "Why hello there!" he says, brimming with happiness for the young trainer that stands before him. "You may call me Professor Rowan. I am the resident expert on Pokémon evolution in Sinnoh. I presume my assistant told you where to find me? Well, anyhow, you know me, I was up early this morning to continue my research first-hand as there is no other way for me!" He says with a hearty laugh.

Suddenly a couple of angry Starly race in and attack the professor before he is able to respond. "Argghh!! These pesky Starly are always here to try and prevent me from reaching their nest." he says while reaching for his briefcase. "Drat! it's too far away. Ok then, the both of you, grab yourself one of the PokéBalls in my briefcase that's near you and use it to fend off these Starly. Quickly!"

You step forward and open Professor Rowan's briefcase to find more than the usual three PokéBalls. In fact, there are eight and you may have the choice of any of them:

Turtwig
Chimchar
Piplup
Starly
Shinx
Burmy
Buneary
Stunky

You choose the one which suits you the best and get ready for the fight. Post you response as a new thread.