how to get lunatone and solrock on pokemon platinum

[slingshot]

how do you get lunatone and solrock on pokemon platinum

[Zidarose]

Lunatone and Solrock are Dual-slot Pokemon, requiring you to have Ruby and Sapphire inserted into your DS after you have obtained the National Pokedex.

Solrock, with Ruby inserted into your DS can be found here:
Lake Verity
Lake Valor
Lake Acuity
Mt. Coronet (middle)
Sendoff Spring
Wayward Cave

Lunatone, with Sapphire inserted into your DS can be found here:
Lake Verity
Lake Valor
Lake Acuity
Mt. Coronet (middle)
Sendoff Spring
Turnback Cave

More information on Dual-slot Pokemon can be found here:
Pokemon Platinum Dual-Slot Pokemon