XPLD works between different endian works only starting ASE 12.5.3+. XPLD between same endians have always worked in the past although Sybase used to say "unsupported"
This is like any other Dump/load nothing special is required except that there should 1-1 character set mapping between source and target. You can't do a sjis --> iso_1. This screws up the byte order when ASE loads pages on the target.