What you need to do is fly to the Pokemon league and go down the waterfall go to the left side and use the dowsing meter (itemfinder poketech app # 7)and you should find it in patch of flowers. -(different person): that's how you find the sky plate not the water plate
underground
it's ZAP PLATE and you find it underground
there isn't a aqua plate it is a splash plate, you find it underground
You can dig Iron Plate up underground or find one buried somewhere on Iron Island. * You can find it on a rock up a water fall in the mountains where you would find a dratini.
Find it on Route 217 or Dig for it Underground.
you can't find any plates,sorry.get diamond out,find a plate there,give it to a Pokemon,trade to someone you trust,switch games,then they trade that Pokemon to your HG/SS
You can find it at the Solaceon Ruins or dig it up under ground.
You get the choice if a Turtwig Torchic or a water Pokemon at the start of Diamond
In the desert. (No really, simple logic in the water!)
you can find it while mining underground.
No you can not find any sort of plates in anyame except for pearl and diamond.
you can find one while mining