Lagging Tail

Lagging Tail is a held item thet appears in the Generation IV Pokémon games. When held by a Pokémon it causes it to strike last (basically it is the polar opposite of the Quick Claw item).

==In Pokémon HeartGold and SoulSilver It can be found on Route 47. Slowpoke & Lickitung occasionally found holding one in the wild.

SlowpokeTail
It is possible that the Lagging Tail is the Generation IV's version of the SlowpokeTail item found in the Generation II games (due to it being held by wild Slowpoke and it effect when held in battle). However the difference is the SlowpokeTail doesn't effect Pokémon holding it.