Palace manager Alan Pardew said after the 1-0 defeat: “We know his heart and soul may be elsewhere.”
Bolasie said the move to Merseyside was a “no-brainer”, adding: “Now that I’ve come to Everton, the job is not done. I’ve got to work hard and feel my way in. I’m ready and up for the challenge.
“It’s not about the money for me. It’s about looking at the ambition of the club and where they are trying to get to. I just like to play football.”
Everton manager Ronald Koeman said: “Yannick is a player who has been a long time on my radar because he’s the type of winger I like – fast, strong and he can play different positions in the forward line.”
Bolasie is Everton’s fourth major signing of the summer.