how to open .xps file?

[Deoxys]

It should be as long as you got it from a reliable source and not just some random site on the internet.

 

I got it from gamefaqs

[Haldrie]

Sounds reliable to me. What is it for?

Edited August 25, 2007 by Haldrie

[Agozer]

Sounds reliable to me. What is it for?

It's a Pro Action Replay save. Most likely for a GBA Pokémon game since only GBA PAR seems to use .xps and .sps file formats. IIRC, most (if not all) GBA emulators can't handle PAR saves, they can only deal with PAR codes.