I'm sorry, but you will have to trade from Pokemon LeafGreen or FireRed. There is no way to find a Poliwag in the wild in Emerald.
You'll need to trade for it.
poliwag is usually on the beach.
Lucario isn't in Sapphire,Sapphire is a Hoenn pokemon,Lucario is a sinnoh pokemon.
Shiny Poliwag can be anywhere in water, but you would have a very very very little chance of finding it.
I'm sorry, but you will have to trade from Pokemon LeafGreen or FireRed. There is no way to find a Poliwag in the wild in Emerald.
You'll need to trade for it.
There is no Pokemon mansion in sapphire.
He is not in Pokemon: Sapphire. You will not be able to find him. He is in Pokemon: Diamond, Pokemon: Pearl, and Pokemon: Platinum. You will definitely have trouble finding him in Pokemon: Sapphire.
Nope, you have to fish.
surf on water or get a fishing rod
poliwag is usually on the beach.
you can't find it in Pokemon sapphire, but you can find it in Pokemon ruby. Hope this helped. :-)
You can find poliwag at: Silent Chasm 5-9, Northwind Field 1-4, Waterfall Pond 1-5 (8.1%)
Lucario isn't in Sapphire,Sapphire is a Hoenn pokemon,Lucario is a sinnoh pokemon.
Shiny Poliwag can be anywhere in water, but you would have a very very very little chance of finding it.
Nowhere, you need to breed Poliwhirl/wrath/toed.