Lapras
Lapras, Pokemon #131, is a combination ice/water pokemon. A grown lapras is approximately 8ft. 2in in length and weighs 485 lbs. Some of Lapras' noteable attacks are ice beam and water gun. Lapras have the ability to communicate telepathically with humans, as seen in Pokemon episode, Holiday Hi-Jinx. In that episode, a Lapras worked for Santa Claus and helped Ash return Santa's lost boot and lost Jinx.
Lapras became a permanent part of the Pokemon television series during the Orange Island League episodes. Ash befriended a lost Lapras that had been separated from his family. When Ash found Lapras, he was being abused by a bunch of punks on the beach. Lapras did not trust Ash at first, but eventually warmed up to him.
As usual, Ash never intends to keep any of his Pokemon and eventually returned the Lapras to his family. Lapras ferried Ash and his friends around the Orange Islands during their wacky adventures.