The Locket

Description
A strange locket, which replaces the Heart Locket on a Genocide Route. It's a Defensive Item, giving the player a 99 Stat Boost in their Defense.

As stated above, it cannot be obtained within a Pacifist Route/Neutral Route, as it's replaced by the Heart Locket.

Trivia

 * According to it's Info, you can "Feel it beating" as if it were a real heart.
 * It's believed to be the Defensive "Worn" item that is attributed to the Player, and more closely, Chara in a Genocide Route