It has been reported that Robles has decided against signing a new deal with Everton and wants to return to Spain.
Spanish clubs Malaga, Deportivo La Coruna, Las Palmas and Getafe all are interested in the 27-year-old goalkeeper, according to Marca.
Robles joined Everton from Atletico Madrid in the summer of 2013 when Roberto Martinez was in charge of the Toffees.
The former Spain Under-23 international has struggled to establish himself as the first-choice goalkeeper at Goodison Park.
New summer signing Jordan Pickford is going to be the first-choice goalkeeper at Everton next season, which means that Robles will continue to struggle for playing time.
Everton will be aiming to finish in the top six of the Premier League during the 2017-18 campaign.