Trade It From Pokemon Ruby Or Pokemon Emerald Version
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Improved Answer by Molokaicreeper:
Yes there is ONE way to get SEEDOT in Sapphire and I just caught
mine. You need to have battled the Pokemon League and completed the
game. One of those visits back home to Littleroot Town, make sure
to watch your bedroom's Television. If you're extremely lucky, an
announcer will be on TV saying that there was a rare sighting of
the Pokemon SEEDOT in route 117.
I was misled by reading in the web that SEEDOT is not available
in Sapphire, but as I went to route 117 I walked in the small patch
of grass. I DID NOT FIND JUST 1, but I encountered 2 (yes TWO)
SEEDOTs there. I fainted the first one (duh) and I caught the other
one!
The PokeDex entry still says the area is unknown. But I
succesfully caught mine there.
Yes SEEDOT CAN BE CAUGHT in Sapphire. Wait for the announcement
on TV to get it!
Thank you!
thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!
thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!
thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!
thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!
thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!thankyou!
Thank you SO much!!!
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You're welcome ;)