Forget the grass/fire/water standard for a sec. Forget type triangles. Forget any attempt at stat balance. You're a poke prof. and you get three --and just three-- pokemon that you get to throw at 10 year olds that come to you to start their pokemon adventure. Which three pokemon are they?

Also pick a tree and maybe some kind of gimmick or encounter scenario if it helps add some flavor or logic to your selection.