Nope, you'll have to trade it over from FireRed or LeafGreen.
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Nidoran{male) LV.16 to Nidorino then use Moon Stone to evolve Nidorino to Nidoking
Safari Zone
clefairy,jigglypuff,nidorino & nidorina
its not an emerald its RAYQUAZA the main legendary Pokemon in Pokemon emerald.
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