Poliwhirl

Poliwhirl (ニョロゾ) is a -type Pokémon. Poliwag evolves into Poliwhirl. Poliwhirl has two choices of evolution - it can evolve into a Poliwrath via a Water Stone, or it can be evolved into a Politoed by trading it with the King's Rock item attached.

Appearance
Poliwhirl is a large, amphibious froglet-like Pokémon. Poliwhirl has arms; the hands appear to be like gloves. When a Poliwag evolves, the spiral on its belly reverses direction.

Special Abilities
Poliwhirl can have the abilities Damp and Water Absorb. Water Absorb allows Poliwhirl to recover 1/4 of the HP the attack would perform if the attack is a -type. Damp prevents opponents self-destruction. It is capable of living in or out of water; in order to live out of water, it must sweat to keep its body slimy. It prefers to live underwater in ponds where there is less danger. In battle, it uses the spiral shape on its belly to put the foe to sleep. It does this by subtly undulating the spiral, causing drowsiness and eventually sleep. It is also capably of easily escaping the grasp of foes due to its greasy skin.

In the Anime
Misty had a Poliwhirl in the Johto series, after it evolved from the Poliwag she caught in season 2. It later evolved into Politoed.

In the TCG
Poliwhirl appears several times in the Pokémon Trading Card Game. More specifically, it appears in the Base Set, Base Set 2, Gym Heroes (as Misty's Poliwhirl), Neo Discovery, Expedition, Skyridge, EX Fire Red & Leaf Green and EX Unseen Forces.

In the Manga
Red starts his journey with a Poliwhirl and a Bulbasaur, the former being his friend for a long time, and had evolved into Poliwhirl from Poliwag to save him from drowning. It later evolves into Poliwrath to save Red from drowning a second time. Poliwhirl was the only Pokémon of Red's that fought against Lt. Surge to free all of the captured Pokémon.