How do you get ring entrance music as a boxer so you can look cool when you're walking into the ring?
Only in special national final events. Otherwise no. Some club shows have it but its everyone gets the same eye of the tiger tune kinda deal
Only for special events, and even then it's rare. Usually you're already at the bottom of the steps to the ring while they are announcing the winner of the previous fight, and then when they leave the ring, you enter.
Here in Scotland at boxing shows we do. At your own club you choose your own but at others you just have what's there. Not at competitions though.
Sometimes they have it at club shows and in finals at international tournaments. It's especially popular in eastern Europe. At major championships they don't have it.