Where are professor oak's aides in FireRed?

One appears after beating brock at route 3, one is at route 2, one is in the rock tunnel Pokemon center (its not in the cave right outside the cave), one is in a big building on the route east of vermilion city, on the route east of fuchsia city in a big building another oak aide is in there, another one is inside a big building on the route west of celadon city.