The Great Achievement is that you beat the Champ and became Champ.

you go to one island and go inside the red building. talk to the guy by the machine and he
will ask you for the red ruby.the red ruby is on one island.go back and give him the ruby.
then he will ask for the sapphire i think. the sapphire is on six island.get the sapphire
and give it to the guy. the machine starts working and when you go to cercuelean cave the
gaurd isnt there.


msbeerens is wrong. i know im right because i have mew two which is in the
cave!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

hope this helps!!!!!!!!

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YOU HAVE TO WIN THE ELITE FOUR!!!!!!!! then you go and he will let you in (i think)

beat the elite four and complete the pokedex or national pokedex

beat the e4, catch over 60pokemon and help celio find the saphire and ruby. i know... i
beat the game about four times...