Minion Masters

It appears there is some confusion to this achievement.
To get this achievement, you basically need to play three different custom 1v1 games with 3 different friends. Here's how to do a friendly challenge:
1. From the main menu, click "create lobby" at the bottom middle of the screen, next to "battle"
2. It will pop up with a menu with that says guild lobby and friend lobby with different buttons. Choose the bottom right button. It is the "battle" mode under "friend lobby."
3. You have now created your lobby and should be back at the main menu. You should be able to view your lobby in the tiny box in the bottom middle of the screen. Click on "invite friend" and then choose your friend. The person you are challenging must be on your friends list.
4. Once your friend has joined, you must both select ready for the game to start. Play the game, win or lose you will still get credit.
5. Once the game ends, the achievement tracker won't update until you are both back at the main menu.