Poliwrath

Evolution

Poliwrath, the Tadpole Pokémon. Poliwrath is a Water/ Fighting type Pokémon, and it evolves from Poliwhirl when a Water Stone is used. Poliwrath is one of the final evolutions for Poliwhirl, the other being Politoed.

Red, Blue and Yellow

Poliwrath was introduced in Red and Blue Version. It’s #62 in the Kanto and National Pokédex.
Poliwrath cannot be caught. You must evolve a Poliwhirl to obtain Poliwrath.
Poliwrath is the only evolution to Poliwhirl in Red, Blue and Yellow. Politoed wasn’t introduced until Gold and Silver.

Gold, Silver and Crystal

Poliwrath in Gold and Silver got some new traits. There is now breeding, so Poliwrath can either be male or female, and it’s in the Water 1 egg group. Poliwrath can be Shiny as well. Poliwhirl can now evolve into Politoed, a Water type, by trading it with a King’s Rock attached, instead of only Poliwrath.
Poliwrath cannot be caught in Gold, Silver and Crystal. You must evolve a Poliwhirl to obtain Poliwrath.

Ruby, Sapphire and Emerald

Poliwrath cannot be caught in Ruby, Sapphire, or Emerald; you have to trade it from FireRed or LeafGreen. In Ruby and Sapphire, Pokémon got Abilities, and Poliwrath’s is either Water Absorb or Damp. Water Absorb recovers 25% HP when Poliwrath’s hit by a Water type move, and Damp prevents Exploding or Self Destructing in a battle.

FireRed and LeafGreen

Poliwrath cannot be caught in FireRed or LeafGreen. You must evolve a Poliwhirl to obtain Poliwrath. You can then breed Poliwrath and trade a Poliwag, Poliwhirl or Poliwrath over to Ruby, Sapphire, and Emerald if you want.

Diamond, Pearl and Platinum

Poliwrath cannot be caught in Diamond, Pearl or Platinum. You must evolve a Poliwhirl to obtain Poliwrath. If you migrate a Poliwrath from any of the Advance games, you’ll find Poliwrath in the Pond area of the Pal Park.

HeartGold and SoulSilver

Poliwrath cannot be caught in HeartGold or SoulSilver. You must evolve a Poliwhirl to obtain Poliwrath.

Black and White

Poliwrath can be caught in Wellspring Cave, Challenger's Cave, Victory Road and the Giant Chasm, after beating the Elite Four and obtaining the National Dex. You must fish with a Super Rod to find Poliwrath.