go get mewtwo from ceruleon cave and get all the Pokemon you have missed
beat the elete four, but theres still tuns you can do after that.
Beat the elete four 19 times.
beat the elete four on evergrand island .to get the building you must go through the tunnel. i just followed the walls . o yah have a fire or water Pokemon with you , they have level 50 ghost Pokemon!!!!hope this helps you!!!!
after you beat the elete four go in tall grass and you will find level 50 Pokemon there.
you cant but you can battle the elete four as meny tymes you want 1st beat the elete 4 then watch the ending till it says the end then go to the elete 4 and tada you can fight em 10000000000 times
Palkia cannot be found in Pokemon diamond, but after you beat the elete four if you go to celestic town the elder will show you a picture of palkia and you will have "seen" it.
get your card to black complete pokedex win master rank in contest get platinum flag beat elete four then your done
after beating all the elete four
get the national pokedex peace out
beat the elete four then take the ferry
you can go buy yourself a cookie and pat yourself on the back. yes cookies are fun :). Then you can tell your big brother.
Battle other trainers until you are strong enough to beat the elete four then mop the floor with them over and over again.