You can catch Dialga, Giratina, Cresselia, Rotom, Azelf, Mesprit, and Uxie, and with the WiFi events you can catch Darkrai, Arceus, and Shaymin and if you get the movie Regigigas you can catch Regice, Registeel, and Regirock. If you have the three Regis, you can catch Regigigas in Snowpoint Temple. You can also get a Manaphy by downloading it off of Pokemon Ranger once you have obtained the Manaphy egg in it. When the egg hatches, breed Manaphy with something and you will get a Phione. Also, you can migrate all the other legendaries such as Mew, Mewtwo, and Rayquaza from GameBoy Advance games.
Sadly, no. The creators of the game forgot to add in the Pokedex, so trading is impossible without GameShark. :(
You got to go to iron island and at the end of it you find it
the item legendary diamond legendary diamond legendary diamond
Tornadus, Landorous, Reshiram, Virizion, Terrakion, Cobalion, Kyurem, and Victini.
the legendary Pokemon in diamond and pearl are dialga and palkia.
No, a Bidoof cannot evolve into any Legendary Pokémon in Diamond.
Dialga
alabast
arceus
IF YOUR ASKING IF YOU CAN RECRUIT LEGENDARY POKEMON IN THIS GAME YES YOU CAN BUT YOUR TEAM HAS 2 BE A SIZE 2 IN ORDER 2 RECRUIT A LEGENDARY POKMON WHO IS A SIZE 4 WHICH EQUALS 6..GLAD 2 ANSWER...VERONICA
The Legendary that you can obtain in Pokemon Diamond are, Heatran, Uxie, Azelf, Mesprit, Dialga, Giratina, Cresselia, spiritomb,and Regigigas.
To get a swampert just choose Muskie as your partner and journey with it untill it evolves. If you cannot choose Mudkip, look near lakes and rivers maby.