level 24 you can go on http://bulbapedia.bulbagarden.net and it has all Pokemon information including evolution and levels.
level up a poliwag
It evolves into a Polywhirl at Level 25, and then to a Polywrath when given a water stone.
Polywhirl evolves using a waterstone and if you want a polytoad you will Need a kings rock and trade the polywhirl.
POLYWHIRL!
polywhirl does not evolve by level to get a polywrath you have to use a water stone. If you want politoed, trade poliwhirl with somebody, and it will evolve into politoed.
Yep.
Poliwhirl evolves from Poliwag. It evolves from Poliwag at level 25, and can be evolved into either Poliwrath (by using a Water Stone) or to Politoed (by being traded by holding a King's Rock).
An old Man in Cerulean City, he'll ask for a Polywhirl.
Poliwhirl evolves into Politoad when you trade it while it is holding a King's Rock.
To get the Pokemon Poliwrath in Pokemon Diamond version you have to evolve a Polywhirl. To do this, you need to expose it to a water stone.
it can only evolve through stones. it may evolve into a Poliwrath with a water stone (get from Bill's father after showing him Staryu at Cerulean city), or a Politoad using King's rock (you get it from some guy at Mt. moon after you surf and find him)
Poliwag evolves into Poliwhirl, starting at level 25. Poliwhirl, then, can evolve into Poliwrath when a Water Stone is used, or into Politoed, while holding a King's Rock and traded.