You can awaken again. Since he's already +4, you shouldn't need max friendship. Just research with any other mega.
The green box at the bottom will display the Awakening the egg will have.
@Tomer_Avraham You can get him to max lvl ultimate in a day with just food. And you get a bunch of free mega vouchers just for logging in. No money needed.
Also if anybody else would like to join for CoOps