Kabarex82

So i was trying to do the legendary birds quest. Went to the fire island. Realised i didnt have 6 100lv fire type pokes so i couldnt fight the fire siege and decided to leave. When im trying to pass a certen point while surfing it says " the water is impossible to pass". I got a psyduck with cloud nine ability but still. Im stuck at that map. Pls help!