As far as I know, the level of 'friendship' your Pokemon has varies depending on how long it has been with you or how much it likes you. I don't think there is a hard rule that tells you when they should evolve, but I do know it takes a few months at least.
[Or even longer, if you're Nagi.]
I don't know if I can say there is a certain type of music I like specifically. ...it varies too, I suppose.
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[Or even longer, if you're Nagi.]
I don't know if I can say there is a certain type of music I like specifically. ...it varies too, I suppose.