First you have to get to the elite for, past Victory RD. You have to use your strongest Pokemon. Once your there, Your rival will come to battle you once you're at the door. Usually it's Staraptar (beat it with Electric or ICE), Heracrossbeat it with Flying [X4 Effectivness], Psychic or Fire), or Snorlax (beat it with Fighting).
No, you do not have to beat the Elite 4 to get the National Dex in Pokémon Diamond.
the credits start
beat the elite 4 dips hit
beaten down by close combat!
you have to beat the elite 4
snow point city
Beat the elite 4 7 times retards!!!!!!!!!!!!!
Beat The Elite 4
you get it after you beat the elite 4 go to the desert and catch one.
you have to beat the elite 4 and go back to turn back cave where giritina is in Pokemon diamond or pearl. and its next to a portal. you have to beat the elite 4 and go back to turn back cave where giritina is in Pokemon diamond or pearl. and its next to a portal. you have to beat the elite 4 and go back to turn back cave where giritina is in Pokemon diamond or pearl. and its next to a portal.
You have to get all 7 Gym Badges, beat the Elite 4, and defeat the Champion, Cynthia.
catch legendary Pokemon like giratina and heatran