User blog comment:Clover G OPTC/New to game CD count/@comment-29682895-20170706104749

You can only decrease skill cooldowns powering up the character with either their Skill Books or by the same character/a character with the same Special. Note that when you Evolve a character, if the Special is not the same, you will lose all the Special levels you got. This doesn't apply to Super Evolutions though, those will stay the same.