What pokemon do i need to catch and where can i find them in pokemon diamond?

Question

I have seen the following pokemon:
Turtwig Grotle Torterra Chimchar Monferno ---- Pilpup Prinpup
Empoleon Starly Starvia Staraptor Bidoof Bibarel Kricketot
Kricketune Shinx Luxio Luxray Abra Kadabra Alakazam Magikarp Gyarados Budew Roselia Roserade Zubat Golbat Crobat Geodude Graveler Golom Onix Steelix Cranidos
Rampardos Shieldon Bastiodon Machop Machoke Machamp
Psyduck Golduck ----Wormadam Mothin Wurmple
Silcoon Beautifly Cascoon Dustox Combee Vespiquen Pachirisu Buizel Floatzel Cherubi Cherrim Shellos Gastrodon
Heracross Aipon Ambipom ---- Drifblim Buneary
Lopunny Gastly Haunter Gengar Misdreavus Mismagius
Murkrow Honchkrow Glameow Purugly Goldeen Seaking
Barboach ---- Chingling Chimecho Stunky Skuntank Meditite
Medicham Bronzor Bronzong Ponyta Rapidash Bonsly Sudowoodo Mime JR. Mr.Mime Happiny Chansey Blissey Cleffa Clefairy Clefable Chatot Pichu Pikachu Raichu Hoothoot Noctowl ---- Gible Gabite ---- Munchlax Snorlax Unknown Riolu lucario Wooper Quagsire wingull more..

Pelipper Girafarig Hippopotas Hippowdon Azurill Marill Azumarill Skorupi Drapion Croagunk Toxicroak Carnivine Remoraid octillery Finneon---- Tentacool Tentacruel Feebas ---- Mantyke Mantine Snover Abomasnow Sneasel Weavile----Mespirit----and of course dialga. Witch pokemon do i not have and where can i get em?

Answer 1

That is a long list
You see all of those pokemons by just fighting trainers. Just battle everyone and you will see them.

Answer 2

Before the Elite Four, you can catch Dialga (after beating the Snowpoint City Gym), Azelf, Uxie, and Mesprit (after beating the Canalave City Gym). After the Elite Four, there's no new legendaries, until you get the National Pokedex. Once you've retrieved that, you can catch Cresselia, Shaymin (event only), Darkrai (event only), Heatran, Arceus (cheat only), and Giratina.

Answer 3

this is comics and animation not video games.