They are rare, but you can find them on routes 209 and 210. If you have beaten the Pokemon league than you can go to trophy garden to capture one.
evolve your chancey
the safare
Safari Zone.
of a chancey sorry about the spelling you have got a 5% chance of it holding it
give it 2 a happiny to hold and it will evolve to a chancey when its happiness maximises
find a Chancey, and then get it to max friendship and level it up
you can find it from route 14 or 15 i don`t remember which one is it
I don't think so. You can trade it from other games though.
you do not find dialga in Pokemon pearl
10,240 steps, I find everything Pokemon on serebii.net.
Just be patient and find one in the safari zone,the only place they are
Trade with Pokemon Pearl or Pokemon Platinum