you have to see 150 Pokemon then talk to professor oak..
425
You can find out how many times you have beaten the Elite Four in Pokemon Diamond by checking your PC in the game.
Plenty of Ponyta can be found south of Hearthrome City, or, if you have the National Pokedex, you can find many fire Pokemon in the valcano near the resort area.
104 before the national pokedex expansion
u can find them wild
150 (and Manaphy, but you don't need to see or get it) in the Sinnoh Dex, and 493 in the National Dex. There should be 151 Pokemon in Pokemon Diamond.
149 in the Sinnoh Pokédex. 493 in the National Pokédex.
There is only one Master ball in Pokemon diamond so use it wisely. I hope you can find it!
They are around many of the cities, but they can be hard to use.
Barboach can be caught using the Good Rod in many bodies of water in Pokemon Diamond. One of the areas where it is easy to find with the Good Rod is the Great Marsh.
As many as you can find I had a Sneasel Magikarp Geodude Shaymin and Seaking
Find an action replay code and program it, that's how you get many masterballs on Pokemon diamond action REPLAY. ;)