go to snowpoint city talk to the man near a boat and set sail to the other part of the place
Petalburg City is not in Pokemon Platinum.
no there are not sorry.
You can find a Shell Bell at Hearthome City in Pokemon Platinum.
Hearthome city.
below hearthome city
In Pokemon Platinum, Diamond, and Pearl, the department store is is Veilstone city.
Eterna City
you surf
hearthome city
Jubilife city
pancakes
it is in veilstone city