Pendant Paradox (Reasons for)
Please note that under the theories regarding time, there is actually no paradox or inconsitency here. This entry is thus listed under Theory (Principles of Timelines and Dimensions) instead of being placed with the other, genuine problems at Theory (Time and Dimensions).
If Schala gave Kid her pendant before sending her to 1004 A.D., it means she kept her pendant with her after the Ocean Palace incident. How then would the pendant exist on the outside world and come into possession of the Guardia royal family, eventually ending up with Marle, who used it in Chrono Trigger? How was it originally passed down anyway before Crono started time traveling? Would its absence potentially undo Chrono Trigger, preempting Marle from reacting with the Telepod to enter 600 A.D. or charge it up at the Mammon Machine to get around Zeal?
TTI and Time Bastard dictate that regardless of what Marle or Crono were doing at the Millennial Fair in 1000 A.D., they would appear in 600 A.D. and their versions in 1000 A.D. would disappear at the original time of departure. Additionally, all matter going with them, such as Crono's wood sword or Marle's pendant, would be subject to these laws and would appear in 600 A.D. and be removed from the present. Under these theories, the pendant would materialize with Marle in 600 A.D. when she first time traveled and was thought to be Queen Leene, circumventing the need for the pendant to be physically passed down among the royal family for 13,000 years. For the issue of Time Bastard applying to the pendant itself, please see Misconceptions.
Time Bastard's Application to the Pendant
Some debate that the Immune Pendant theory is flawed because the pendant on Kid would be subject to Time Bastard. That is, since the pendant would go to 1004 A.D. with Kid from the Darkness Beyond Time, it would "pass" Marle's instances of time traveling, which take precedence. However, it is important to consider that Time Bastard operates on personal time. Let's examine the pendant's personal history.
Pendant is created in 12000 B.C.; used thirteen thousand years later.
Pendant is created in 12000 B.C.; used almost instantly afterwards.
Thirteen thousand years would have to pass until the pendant disappeared due to Marle's original time traveling with it. It would disappear roughly in 14004 A.D. to appear in 600 A.D. with Marle. The same case can be applied to the Vests and Mails in Chrono Trigger. Crono can use both the vest and mail because he has traveled through time with the mail before retrieving the vest. After four hundred years, the vest would presumably be subject to Time Bastard and disappear. Crono is not violating the conservation of energy or time in this manner; he is merely using the same item in two different stages of its personal history.