i encounter same bug/error of Eltrat post. (item pokéball route 26 (pick up crash the game) , waterfall lock route 27 (can't open menu of move, restart the game and don't do it again),
i report other here:
in Olivine city at Olive Lighthouse , before giving the medecin for cure the pokemon ( i recommand to save and count the number of move u need for go back the previous floor, because after cure him he flashing the screen all is white and u can move but see nothing). sorry no screen of that part...
At National park we have 2x entrance south and west (the south entrance crash the game)
i encounter Raikou and Entei , it's write Suicuine talk, typo error.