You have to go to Veilstone City to the headquarters of Team Galactic. and the man before the headquarters has the Storage Key. with this key you have to go to the Warehouse (at the top on the left side), also in Veilstone City.
Chat with our AI personalities
If you have Pokemon Emerald in your GBA Slot (this also works for Pokemon Pearl and Diamond) Pokemon Platinum- Route 217, Lake Acuity Pokemon Diamond & Pearl- Route 217, Acuity Lakefront, Lake Acuity
Lake Acuity is to the east of Snowpoint City, and you pass Acuity Lakefront on your way to Snowpoint City from route 217.
lake acuity, valor, and verity in the island caves
Verity lake is in the south west corner. Acuity lake is all the way up north. Valor is in the south west corner.
you have to go to lake verity first then go to acuity.