Doppel Doll

The Doppel Doll (ドッペルくん) is a Key Item in Chrono Trigger. Created by Norstein Bekkler, a powerful magician, these dolls are identical copies of the party members won by playing the mini-game at his Tent of Horrors in Leene Square. For a few Silver Points, a party member plays a game roughly equivalent to "Simon-Says". Follow the movements of the Doppel Doll to win one as a prize. Each character in the party has the opportunity to win one; two copies of Crono are obtainable. Once the duplicate is won, it will appear at the home of the person who won it (see below).

Story
After traveling to the Ocean Palace and witnessing the awakening of Lavos, Crono, his friends, The Prophet, Schala, Janus, and Queen Zeal are transported to an alternate dimension inhabited by the alien parasite. Attempting to do battle, the party is immediately devastated by the twin might of Lavos and Queen Zeal. To save his friends from death, Crono accepts the blow. Schala, using her Pendant, transports the party safely to Last Village where they witness the destruction of the Ocean Palace and the Fall of Zeal.

Traveling to the End of Time to seek advice from Gaspar, he supplies them with the C. Trigger and asks them to seek Belthasar in the year 2300 A.D. The Guru's Robotic Nu advises the party to find a Doppel Doll. Once acquired, they scale Death Peak where the C.Trigger shatters, teleporting them back to the exact moment before Crono sacrificed himself, and they replace him with the Doppel Doll. Ever-grateful, he rejoins the party again.

Locations
The Doppel Dolls won by each character are found as follows:
 * Crono: Crono's House
 * Marle: Guardia Castle, Present
 * Lucca: Lucca's House
 * Robo: Proto Dome, Future
 * Frog: Cursed Woods, Middle Ages
 * Ayla: Chief's Hut, Prehistory
 * Magus: North Cape, Antiquity

Etymology
Doppel Doll, or "Doppel-kun" in Japanese, is a portmanteau of the words "Doppelganger" and "Doll". The suffix "-kun" in Japanese is an honorary title given to young men, and Crono's martyrdom is widely viewed as honorary.