if you mean vanish as in flee like mesprit, cresselia, moltres zapdos and articuno, its because they are supposed to do that and they do that in platinum and diamond too. you can only get moltres zapdos and articuno in platinum. to stop them from fleeing, you should have masterballs or a TRAPINCH in your first slot but you cant switch out because it knows sand trap or whatever its called to stop Pokemon from fleeing or have a haunter or any ghost Pokemon that knows mean look or a sudowoodo that knows block and USE those moves IMMEDIATELY when you see them. hope i helped! :)
some of the Pokemon are different such as diamond has dialga and pearl has palkia some of the Pokemon are different such as diamond has dialga and pearl has palkia
Google "master code Pokemon pearl ar" and you should get some results Google "master code Pokemon pearl ar" and you should get some results Google "master code Pokemon pearl ar" and you should get some results
The Pokemon Mansion is home to some rare Pokemon. To find it in Pokemon Pearl version, go to route 212.
You cannot get a Murkro in Pearl, it is a Diamond only pokemon. Some pokemons are exclusive to Diamond and others are to Pearl.
Palkia is the legendary Pokemon in Pearl, and there is also various Pokemon found in Pearl, but not in Diamond. Diamond has some, that Pearl doesn't have.
some flying types
They have all the Sinnoh pokemon, and some more.
There actually aren't any cheats for Pokemon pearl, but if you have an Action Replay look up some codes for that
Go into the PC deposit some Pokemon then withdraw some.
lyrics and sheet music,pokemon pearl and platinum
Here are some Pokemon cheats for pearl: Rebattle
some where