well, I believe I ended my game before getting to the Pokemon League. When I acquired my raft, I didn't go in the order of events as they should have, jumped around the map, didn't explore the "Rock Tunnel" much, nor used the video phone outside the entrance. Instead went straight to the 1st movie to battle Mewtwo, Lost my raft and I believe lost the ability to enter the Pokemon League, in addition I failed the Pokemon League Exam (maybe this plays a part as well?), however I have beaten all gym battles, including Viridian City, explored every city, village, forest, explored every single house, building, event, etc over and over, and Officer Jenny still blocks the path to Victory Road and Indigo Plateau, Ash's mom has provided the Warp System, All Professor Oak says when spoken to is asking if i want my pokemon back (Muk was given to professor Oak).
So I can only assume due to losing the raft, I am now unable to unlock the Pokemon League? I may have missed something between Cinnabar Island to the Rock Tunnels?
Thus, I believe this is a game ending bug/oversight that may need to be remedied in a future update?
Possibly add a location for the Warp System to teleport you to get access to the Rock Tunnel and possibly the island with the Slowpoke and Surfer, etc? that, or the raft shouldn't be lost when doing the 1st movie event or possibly the old man who gives you the Raft could give it to you again when ever you lose it?