You get them like this:
You have to battle every Pokemon Trainer in Sinnoh.
get advanced trainer and then use it but if your using vista you might get an error
Using action replay get the capture trainer Pokemon cheat and then an ace trainer near stark mtn has one
if you have the steal trainer Pokemon cheat on using a gameshark you will be able to catch any Pokemon you see using a masterball, however if you are supposed to cut the cheat on after the battle has started, keeping it on when you encounter a trainer will force you to fight the trainer because the game doesnt recognize that its not a Pokemon. the trainer has no name and can only do struggle. If you do cathc the trainer it says you caught a ??????? and your game will freeze or be corrupt.
defeat Pokemon trainer red in kanto . reach him using rock climb
Route 223 I believe there is one in Victory Road. It's in a double battle with a Rapidash-using Ace Trainer.
with the ar using the cheat catching trainer's Pokemon and go to route 229 and battle ace trainer Felix and he'll have salamence
walk into the grass and use the pokeradar (after national dex) and if the grass has stars that meens it a shiny pokemon! hope this helped BrYcE:)
By using your Google account or by creating a trainer account through the app.
There's a trainer in route 205 that has a piplup. After you beat the elite four i think you'll have to rematch using your vs seeker and he should have an empoleon
u catch it like any other trainer.
You capture another Trainer's Pokemon using by using a cheat code that comes in the Action Replay DS/DSi accessory, then activating the 'capture trainer pokemon' function of the Action Replay system, then throwing a Poke ball, Ultra ball, or whatever kind of POkemon catching ball you'd like to throw at Registeel, then hope for the best.