The only, ONLY way you can get them is to have caught them in a gameboy Pokemon game and transfer them to your Pearl at Pal Park.
You can't. You must Migrate them from Pokemon Sappire, Ruby, or Emerald. or use AR (action replay)
no. Saphire is generation 3 and pearl is generation 4
You have to trade.
no
you can't get mewthree.MEWTHREE IS NOT A REAL POKEMON
go and catch them
most likely the 3 first Pokemon and starly
493 3 r only by cheat codes
there is no way to capture latias and latios in Pokemon pearl except if you migrate them from other Generation 3.
Go to the following websites for tons of Action Replay codes for Pokémon Pearl! http://us.codejunkies.com/search/codes/cheat_codes.aspx?selp=3&game=Pokemon-Pearl&gameID=17826135&page=0 http://us.codejunkies.com/search/codes/cheat_codes.aspx?selp=3&game=Pokemon-Pearl&gameID=17826135&page=1 Hope this helps!
Transfer it from a generation 3 game.
you cant get a diamond on Pokemon pearl but you can get a pearl on diammond ...and pearl.