Route 101:
Littleroot->Oldale Town

Route 102:
Oldale Town->Petalburg City

Route 103: (need a flying type pokemon or water type to travel this route)
Oldale Town->Route 110

Route 104:
Petalburg City->Petalburg Woods->Rustboro City

Route 105: (need a flying type pokemon or water type to travel this route)
Route 104->Route 106

Route 106: (need a flying type pokemon or water type to travel this route)
Route 105->Dewford Town

Route 107: (need a flying type pokemon or water type to travel this route)
Dewford Town->Route 108

Route 108: (need a flying type pokemon or water type to travel this route)
Route 107->Route 109

Route 109: (need a flying type pokemon or water type to travel this route)
Route 108->Slateport City

Route 110:
Slateport City->Mauville City

Route 111:
Mauville City->Route 112->Route 113

Route 112:
Route 111->Lavaridge Town

Route 113:
Route 111->Fallabor Town

Route 114:
Fallabor Town->Route 115

Route 115:
Route 114->Meteor Falls->Rustboro City

Route 116:
Rustboro City->The Rusturf Tunnel->Verdanturf Town

Route 117:
Verdanturf Town->Mauville City

Route 118:
Mauville City->Route 119->Route 123

Route 119:
Route 118->Fortree City

Route 120:
Fortree City->Route 121

Route 121:
Route 120->Route 122->Lilycove City

Route 122:
Route 121->Mt Pyre->Route 123

Route 123:
Route 122->Route 118

Route 124: (need a flying type pokemon or water type to travel this route)
Lilycove City->Route 125->Mossdeep City->Route 126

Route 125: (need a flying type pokemon or water type to travel this route)
Route 124->Shoal Cave->Mossdeep City

Route 126: (need a flying type pokemon or water type to travel this route)
Route 124->Sootopolis City->Route 127

Route 127: (need a flying type pokemon or water type to travel this route)
Route 126->Route 128

Route 128: (need a flying type pokemon or water type to travel this route)
Route 127->Ever Grande City->Route 129

Route 129: (need a flying type pokemon or water type to travel this route)
Route 128->Route 130

Route 130: (need a flying type pokemon or water type to travel this route)
Route 129->Route 131

Route 131: (need a flying type pokemon or water type to travel this route)
Route 130->Sky Pillar->Pacifidlog Town

Route 132: (need a flying type pokemon. Rapids are too fast for Water Types)
Pacifidlog Town->Route 133

Route 133: (need a flying type pokemon. Rapids are too fast for Water Types)
Route 132->Route 134

Route 134: (need a flying type pokemon. Rapids are too fast for Water Types)
Route 133->Slateport City