I don't think so but you have to get either the mystic or aurora ticket to meet Deoxys...
You can either migrate it from Pokemon Emerald version, get it from trade, cheats, or events. :)
You don't.
yes
it's just by luck
It is not possible to catch Mew is Pokémon Emerald version without using cheats. The only way to get it would be to trade.
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what emerald-kanto
You Need Cheats The Wild Pokemon Modifier.
pokemon colosseum
i don't have emerald but the valuable Pokemon is rayquaza
how to get all the tickets in Pokemon emerald?
You can use Action rReplay for DS Lite for Pokémon Emerald version. Action Replay allows you to do various cheats.