Before you start a game in HUT, at the edit lineup screen it will show you at the bottom if you have a power up player in your lineup. Will have a green icon in the middle lower of the screen. If you do,
Click on him using the right stick (player info/upgrades)
At the top
It will show Tier 1 and you can press RB and purchase Tier 2 for 500 coins.
You can refund your tier after you get the achievement to get the coins back if you wish.