PKMN.NET :: Dex :: Power Anklet
DEX -
ITEMS: Power Anklet

In-game description: A Pokémon hold item that promotes Speed gain on leveling, but reduces the Speed stat.
Price: 3000

Technical explanation and other notes
Speed EV gains are multiplied by 4, but Spped is halved while the item is held.

Fling: 70 base power. Side effect: No additional effect