https://wccftech.com/kingdom-hearts-1-52-5-remix-fan-made-patch-fixes-stuttering-issues-and-more/

A new Kingdom Hearts 1.5+2.5 ReMIX fan-made patch has been released online, fixing some issues that happen when playing the game at above 60 FPS frame rate.

The patch, created by Reddit user Drahsid, fixes the inconsistent stuttering issues that happen in Kingdom Hearts 2 when playing the game at above 60 FPS. Additionally, this mod also fixes some cutscene issues that limit frame rate to 60 FPS.