It should be in Saffron City.
silph co buliding, in saffron
you defeat Pokemon trainer red and then he comes to silph co
Saffron City.
Saffron city.
you have to finish the team rocket part in Silph co. and beat Giovanni.
The president of silph co will give you one.
You get it as a prize from beating your Rival at Silph Co.
The Silph Co is in Saffron city.
safron city
on the second floor
you don't, dummy.
in celadon city