Do I need the Season Pass to buy the new DLC for Dragon Ball Z Kakarot? (Xbox one)?

Today a new Dlc for Dragon Ball Z Kakarot came out and if I want to buy it says that I need the code. How do I get the code for the new DLC?

I can't say because I have season pass with it in the ultimate edition

You might be able to look at retailers on the Internet who sell game keys (e.g. http://www.MMOGA.com), and look there. If you find something you have to enter the code that will be sent to you by email in the store (like a normal voucher code) Good luck!