you have to trade them over
You cannot find Mew, Celebi, Jirachi and Deoxys in Pokémon Ruby. Mew, Celebi, Jirachi and Deoxys are event-only Pokémon. Jirachi was available on the pre-order disc for Pokémon Colosseum that would allow you to download Jirachi from the disc over to Pokémon Ruby.
You have to complete the story mode then catch deoxys, celebi and mew.
It's not possible to capture Pokemon so no. You can unlock pokemon like Mew and Celebi.
The Pokémon that was inside the GS Ball was supposed to be a Celebi however the Producers scrapped this plot due to focusing the 4th Pokémon Movie on Celebi.
jirachi i got him maybbe celebi as if you have it you can get mew
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No
you have to trade them over
No, Deoxys is only in Emerald, and you need to migrate it to can catch it. As for Celebi and Mew, you need a cheat code for them.
mew appears randomly from pokeballs, as well as celebi. has no affect
u can migrate from a gba game or trade.im willing to trade a mew for a celebi.
no they are not i no i thought they were at first not but they not related
you can`t you have to trade them in from the pal park
you cant anymore srry :(
need to get their events
i want to trade celebi for a entei