Routes

Route 1: The Route before Viridian City and at the beginning

Route 2: The Route north of Viridian City and before Viridian Forest

Route 3: The Route west of Pewter City and before Mt. Moon

Route 4: The Route after Mt. Moon and before Cerulean City

Route 5: The Route after Cerulean City and before Route 6

Route 6: The Route after Route 5 and before Vermillion City

Route 7: The Route after Route 10

Route 8: The Route before Celadon City and after Route 7

Route 10: The Route after Lavender Town

Route 11: The Route after Vermillion City and before Route 12

Route 12: The Route after Route 11 and before Lavender Town

Route 16: The Route after Celadon City and before Route 17

Route 17: The Route where there are lots of trainers to battle and after Route 16 OR the Route after Fuchsia City and before Saffron City

Route 18: The Route after Route 17 and before Fuchsia City

Route 19: The Route before the Seafoam Islands OR Seafoam Cave

Route 21: The Route after Saffron City and before Cinnabar Volcano/Mt. Cinnabar

Mt. Cinnabar/Cinnabar Volcano: Can be found using Route 21

Route 22: The Route west of Viridian City and before Victory Road

Victory Road: The Route after Route 22 and before Indigo Plateau

Mysterious Grotto: Talk to the NPC in Celadon City's PokeCenter

Elegant Valley: Talk to the NPC in Indigo Plateau

Mausoleum of Origins: Talk to a guy inside a Green tent in Fuchsia City and defeat him once you have all 8 GYM Badges.