first go to the lake near twinleaf town after you got national pokedex and get pal park first then run around the grass next to lake after a few battles you could start battling it maybe
In Diamond,Pearl and Platinum, You can not obtain Celibi unless... ... You go to a special event. Go to Pokemon.com to see updates on upcoming events!
You cannot catch Celebi in Pokemon Diamond.
Migrate it(Nationaldex needed)First you will need Emerald.Then catch celibi on Emarald and then migrate using palpark.
You can't other wise you have to trade from Pokemon Collosium
you get celibi
unfortunately you dont you have to trade it from diamond or pearl
NO you cant catch syther in Pokemon pearl
You can't catch a charizard in pokemon pearl.
you can get celibi on heartgold only from a wi-fi event
You cannot catch Celebi in Pokémon XD. You Can Catch Celebi Only If You Trade From The GBA System
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 can certainly catch Dioxies in the game Pokemon pearl