Perales first competed for Spain not in Spain at the IPC World Championships in Christchurch, New Zealand in 1998. She finished number three in the 50 m freestyle event. She finished in fourth-place in the 4 x 50 m freestyle 20 points relay, 4 x 50 m medley 20 points relay and the 400 m freestyle. She finished in seventh-place in the 100 m libre event and finished eighth in the 50 m butterfly.