Ansem's Code

Ansem's Code is a code created by Ansem the Wise made up of his research into Sora's heart and a digital copy of himself. In an attempt to atone for his mistreatment of Naminé and Roxas, Ansem the Wise placed the code inside Sora's heart, hoping it would prove helpful in the future.

Kingdom Hearts III
Inside the Gummi Ship, Goofy and Donald are waiting for Sora to set their next path of travel when they are interrupted by a strange ringing sound. Sora pulls out his newly gifted Gummiphone and answers. Chip and Dale have called to tell Sora about some of Ansem the Wise's data that Riku discovered during their time in sleeping worlds. The conversation is joined by Ienzo, who introduces himself and Aeleus to Sora, with an explanation that by defeating their Nobodies, Sora has "recompleted" them, allowing them to work against Xehanort, who they now know was deceiving them. Ienzo has been examining the data Riku found, and informs Sora that they have learnt that Sora's heart doesn't completely belong to him. To everyone's surprise, Sora is not shocked by the information, for he has suspected Roxas was inside his heart for some while. Intrigued, Ienzo signs off to continue his investigations.