You can't catch a Squirtle in Pokémon Pearl. You have to trade it from Pokémon HeartGold or Soulsilver. You can also migrate it from Pokémon FireRed or LeafGreen.
you cant you have to migrate from fire red or leaf green
If you didn't choose squirtle as your starter Pokemon you need another firered or leafgreen to trade one to you.
NO you cant catch syther in Pokemon pearl
You can't catch a charizard in pokemon pearl.
No, you cannot catch Cyndaquil in Pokémon Pearl.
neither of them is better, they are both the same, but in diamond, you catch dialga, and in pearl, you catch palkia, and you can catch different Pokemon in each game for example: you can catch this Pokemon in diamond, but not pearl but: you can catch this different Pokemon in pearl, but not diamond
you would have to migrate it from fire red or leaf green sorry or you could use the GTS in jubilife city to obtain one hope i helped >_<
you can certainly catch Dioxies in the game Pokemon pearl
You cannot catch palkia in diamond and dialga in pearl but you can catch both of them in Pokemon platinum
you can not catch it in pearl but u can catch bagon in pearl
You catch the legendary Poke mon. In platinum you catch GUIRETEINA, in pearl you catch PALKIA, in dimond you catch DIALGA
It's impossible to catch Jiratchi in Pokemon Pearl version.