The pokemon starter store is for extra items that you might need on your journey that Prof. Moonflower has not given you. You walk into the store, smelling the fresh moo-moo milk.
you read a sign that says:
Levels and items
lv 1.
main office-loto ticket corner
lv 2.
potions and health items
lv 3.
poke'balls
1v 4.
pokemon trainer sacks, bikes and ect.
lv 5.
Trainer talk T.V. station
rooftop
Pokemon dolls and bevarages