you can either just be really good at the game or just use a Pokemon modifer code (action replay)
you have to catch all of the pokemon in diamond or SEE all of the pokemon
The only way you can see all the Pokemon on diamond is by going into the GTS and global trade different Pokemon.
All of what?
You can get Pokemon diamond for PC from www.roms.zophar.net/Nintendo-ds/all
you've gotta be crazy if you think someones gonna write all the Pokemon you can catch in diamond
no way
there is no such code.
yes
then you beat the game
no you cant get cheat for all the pokemon.
No, not all Pokemon in Diamond can learn Hyper Beam.
Pokemon diamond