you buy an gameshark then you catch him in emaerald or ruby or sapphire then you transfer him to diamond
use an action replay or gameshark to catch them all
its not possible on diamond/pearl/rs/fg/cgs/colosseum/xd/pbr. its possible only on Pokemon blue/red
Its not possible to catch a level 100 pokemon.
well you can use your gameshark or your ds cheat.and the you can catch a trainers glameow.
Nope. Not legally.
In Pokemon Diamond and Pokemon Pearl, there is no possible way to catch a Giritina. You can, however, either catch one in Pokemon Platinum or trade with someone who does have one. In Pokemon Pearl, you catch Palkia at Spear Pillar. In Pokemon Diamond, you catch Dialga at Spear Pillar.
It is not possible to catch a wild Turtwig on Pokemon Diamond. It is generally impossible to find and catch Starter Pokemon in the wild. This was a mechanic designed to encourage player interaction for trading.
i have Pokemon diamond, and played 600 hours. its not possible. but you can catch a ditto, and make Pokemon eggs.
It's not possible to catch Regirock in Diamond. It's possible to catch the three Regi's in Platinum, when you've received the event Regigigas, but not in Diamond. To get it i Diamond, trade with Platinum, or migrate from either Ruby, Sapphire or Emerald.
you can't catch it until you don't have a gameshark because its impossible to catch without gameshark
no you cannot catch a glameow on Pokemon Platinum unless you trade for it from someone who has Pokemon Pearl (since you cannot catch it in Pokemon Diamond either).