Trainer Red is not in D/P/Pt.
well you to get for Pokemon fire red.
khadels backyard
you can't catch a ditto on Pokemon pearl or dimond but you can migrate from fire red or emerald
I do not have Pokemon fire red I have Pokemon pearl but if you have a r4 do cheat and you'll find out
you do not find dialga in Pokemon pearl
No I don't think so but......
You have to trade it from Fire Red or Diamond/Pearl I believe.
Check your PokeDex. All Pokemon which areas are glowing red need the pokeradar to find them.
you can find marcargo at Red Volcano/Stark Mountain as well as other pokemon of course
The place where it flashes is where you can find the Pokemon It would flash blue if it was found in the water
Put a Pokemon Fire red while you're playing pearl or diamond then go to the valley windworks then you may find it there.
Trade with Pokemon Pearl or Pokemon Platinum