Extend the Story - Add a Room

Without thinking you fling the red and white ball with all your strength. In a burst of red light a small orange Pokemon emerges. A fire burned brightly at the end of it's tail.
"Ember!" you order without thinking.
Instantly a plume of brilliant orange red flame shot forth, scorching the Machoke which gave a shout of alarm. the attack wasn't strong enough to damage it enough but it turned it's attention on you.
"Tackle!"
The Charmanded lowered it's head, dashing at the Machoke and ramming it in the neck at full speed.
"Ember!" you shout, getting into the battle now.
Machoke gave a cry as the flames hit it. It rocked for a moment before falling back, fainting.
"Thank you, you know. You're not bad," Professor Oak says as he rises to his feet. Behind him Renji fixes you with an unreadable stare.
"That was a superb way you fought. Would you like to be one of my helpers in filling in the Pokedex?"
You nod rapidly.
"It seems you have no Pokemon. Would you like to keep Charmander of take one of my other Pokemon?"

I want a Bulbasaur