Well, there are also pointers for 8+ hex characters, which XSE has problems with.
There are three possibilites to fix.
1. You make the pointers manually, its a ~2 min work / script.
2. Make the starterscript into 8-caracter offset and with call @ you point into the expand area
3. You repoint all pokemon sprites to +1000000, delete the whole pokemon then at D00000, be sure you point the graphics into +1000000 and have 0x800000 - 0xFFFFFF for scripts, which is for even 3 regions lol.