idk man i been wonderin the same thing

(rainbow p*** need) go to island 5 then go to dotted hole (if you solve the thumb key and
riched to uknown base)it will open go to the ladders until you see a violet gem.

since the first gem wuz in the volcano cave,
the next gem iz in a cave
but the cave on 6th island and it haz braille on it and it sayz cut
so u use cut on the door and it opens
therez a ladder u hav 2 go down
then there are little holez in the ground so and therez a pattern
after u completed the pattern therez a gem in the middle of the room
and a scientist comez in and takez it and he takez the gem 2 the rocket warehouse
and thatz where u need 2 go

use cut on the door then go through doors, btw there are hidden ones at the side. soon
you'll find the sapphire. but a man will take it. fly to 5th island and go to the meadows
and soon you'll find the rocket warehouse. go inside and whizz about on the floor. soon
you'll get to a woman who after battling will change the switches around so you can go
back in easy after. go and heal your pokemon and finally face the rocket admin who's quite
good. then the scientist will come in, beat im and you have the gem!