you can't catch it in soulsilver (unless theres some cheat for it) you would need to either trade or migrate to get it. it is possible that there may be an event to get this Pokemon but that's as likely as an event to get arceus.
Well, that's a likely figure! As far as my research, there is an Arceus event, and likely, also, to have a Wi-Fi event for Deoxys.
I must have pure luck because I
caught a shiny Lv 87 deoxys at
mt moon on soul silver
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You can't catch Deoxys in soul silver
First you have to catch Mewtwo and then head to Mt Moon at midnight on Monday. Somewhere deep in the cave is were the deoxys are.
you have to get more then 45 gym to catch legendary Pokemon! deoxys is a legendary Pokemon
Yes. it is deoxys of speed. But you need a gameshark
It is impossible to catch a Deoxys in the wild in HeartGold & SoulSilver. You need to get one at a Nintendo Event or transfer one from a GBA game. Theres a Deoxys mission in the 3rd Ranger game. Capture it and it will be comfortable in any 4th gen game.