hi
Mount coronet in pokemon platinum is in loads of places its in eterna city you have to pass the statue of giratina and keep going straight and their is a hiker standing right next to the entrance .Their is also one near celestic town you have to pass the shrine and have to go in the cave which is past all the challengers.Their is also one near snowpoint city which is the entrance to snowpoint city
hope you find mount coronet
mt corenet
Find Nosepass in Mt. Corenet then leave him up in Mt. Cornet.
in mt cornet there are not any
Go to a big lake in mt corenet
U go to Mt. Corenet there are some there
all exsept waterfall
Just level up your magneton in Mt. Corenet and it will evolve.
Train a Magneton at Mt. Corenet
Mount corenet (the fog level)
After you do the mission in Mt. Corenet, it should be open.
go to mt corenet then go to spear pillar
in the very top of mount cornet, after obtaining the adamant orb and lustourous orb in mt corenet. u need waterfall to get them, so yeh