if you've defeated the commader at valley wind works, then catch arceus and gith it to them or pay $100,000.
you go to the oroburg entrince to mt cornet and use rck clime
To get to the top of Mt. Cornet you have to beat the team Galactic Eterna City and Veilstone buildings(otherwise there will be a cave painting blocking the path in Mt. Cornet) and enter Mt. Cornet from the Oreburg-Hearthrome City entrance(This is the ONLY entrance to the summit of Mt. Cornet. The other entrance takes you on the path to Snowpoint City). You need the HMs Rock Climb, Rock Smash, Strength, and Surf (Defog won't work in the cave). Also, when you get to the crumbled cave painting, Looker will give you a Black Flute, which lowers the chance of you running into wild pokemon.
You have to defeat team galactia in mt cornet and then the man guarding the route to sunnyshore goes.
the top of mt cornet is spear pillar
You need to of released the lakePokemon (Azelf, Mesphrit, and Uxie). The you can go there and the cave painting will be demolished.
you have to get strengh.
When you get to the ruins
in mt cornet in mt cornet
mt. cornet
you have to beat team galactic at their HQ
Sorry if i get this wrong but i think mt. cornet
its on the top of mt cornet.
the one beside celestic town
you dont need them to
You can find a Chimecho in Mt. Cornet!!! You can find a Chimecho in Mt. Cornet
On Mt. Cornet at Spear Pillar
there is another entrance on the left