Wartortle,

known as the Turtle Pokémon, is the evolved form of Squirtle. It has a slightly more intimidating appearance; aside from an increased height and weight, it now has darker skin, possesses meaner eyes with smaller pupils, and bears two small outer fangs. Its shell may receive battle scars, from battles that these Pokémon more willingly seek out. A Wartortle also gets a pair of feathery ears, and its tail becomes white, fluffy, and too long to completely hide within its shell; these appendages greatly aid this Pokémon in swimming, acting as oars and / or fins. The tail also happens to be a highly valued collectors' item, which has caused people to hunt this Pokémon, dwindling their numbers. The reason for such poaching may very well be that a Wartortle tail is a symbol of longevity in the Pokémon world, supposedly allowing the creature to live for thousands of years.