Gems randomly appear and you can't predict when and where one will turn up.
the way I got it was, I went to France (World Adventures) then I explored many tombs then finally I found it!
You have to hack the game cause the rainbow gem was unfinished. so hacking is the only way to get it.
you cant.
instead of hacking complete all town and act missions with s rank on silver sonic and shadow and you will have the gem
Howling Horse Mine, Muzzle Mouth Mine and Buried Bones Mine.
the way I got it was, I went to France (World Adventures) then I explored many tombs then finally I found it!
The rainbow gem is an incomplete gem that's supposed to let you transform into super sonic but it doesn't work. You can only get it by hacking.
You have to hack the game cause the rainbow gem was unfinished. so hacking is the only way to get it.
you cant.
Virgin Valley black fire opal
instead of hacking complete all town and act missions with s rank on silver sonic and shadow and you will have the gem
You have to have a high enough relationship with your imaginary friend first. Then some from the science facility asks if you want to bring your imaginary friend to life. When you answer yes, they ask for you to find an unsmelted rainbow jewel/gem and bring it back to them.
you have to beat the game in all story modes and beat the extra boss
1. Beat the elite four 2. talk to celio and he will see if you can find a gem 3.when you give celio the gem, he will say there is another gem in the sevii islands 4. he will give you a rainbow pass and then you can go to 4,5,6,and 7 island.
Howling Horse Mine, Muzzle Mouth Mine and Buried Bones Mine.
The rainbow pass is obtained after delivering the ruby to celio at the one island Pokemon center he will ask to run another errand he needs another gem which is at six island so he gives you the rainbow pass to go to islands 4-7.
Opals have a special characteristic which makes the gem a rainbow-like iridescence that changes colors when turned at different angles.