He will leave after you go to Spear Pillar (and in Platinum the distortion world), then go back and he is gone. You have to have 7 badges to get through.
Yes, on the route above Sunnyshore city
Route 222 is between the Valor Lakefront and Sunnyshore City.
super rod.used on the route outside of sunnyshore city
Surfing or using the Super Rod on the route towards Sunnyshore City.
Go to route 223 or Sunnyshore City and use surf
route 222 is the route you go down to get to sunnyshore city ,but you can only get there after doing team galactic`s veilstone building
You can find a trainer with a feebas on route 222 to the left of sunnyshore city.
you go to sunnyshore city you go to sunnyshore city you go to sunnyshore city
Tentacool can be found/ caught in Iron Island, Canalave City, Pastoria City, Sunnyshore City, Fuego IronWorks, Route 219, Route 220, Route 221, Route 213, Route 222, Route 205, and Route 218. Hope it helps. -CelestialIllusion
You can find him on the shore of route 222 (fisherman) route 222 is the one right before sunnyshore city. hope this helps.
you can find them on route 223 which is victory road which is north of sunnyshore city
Look at Victory Road, The route before Sunnyshore City and Evolve Buizel.