Here are the .rel files for SSBB PAL stages:
https://www.dropbox.com/sh/5i6j0rtkc8x9210/AAD07tN_4beIylLtab-BeUVea?dl=0

Unfortunally NTSC-U .rel's won't work with PAL SSBB.
You need to create your own .rel files with Stage Switcher or something like that.
It works with Riivolution for me.


(If anyone wants to play online. FC: 4086-2214-8475)