it really is the most Pokémon thing ever that they made a route full of rapid water that if you're lucky you might navigate in just the right spot to find an area you can dive, and you follow that along and find a cave where everything is written in Braille - like, the language made for the visually-impaired which can only be read by touching it, which you obviously cannot do through an LCD screen - which if you somehow manage to read it you find out you need to A) use Dig, which if you do happen to have on you you then need B) a fucking Wailord and Relicanth, two late-game kinda hard to get Pokémon I guarantee extremely few people would ever have used one of on their team never mind both water-types at the same time for some reason, and if you DO manage to do all of that it unlocks three caves across the region which it doesn't even tell you where they are and you have to solve more braille puzzles and your prize is 3 pokemon that just arent even good