Where can you find a barboach on Pokemon sapphire?

Barboach is A sinnoh Pokemon which meens you can only have it in Pokemon Pearl,Diamond,Mystery Dungeon Exps of Time and Darkness

Actually you can find barboach in sapphire, but you need a super rod. Some of the places you can find it is in meteor falls with the small parts of water, the elite four waterfall/ lake, and i think at the river with the man who gives you the TM roar near lavaridge.