To obtain this achievement you will need to unlock both Characters first which are:Aquaman
- Can be done during your natural 1000g 100% walkthrough as a hub character challenge. AndAquaman (Gladiator)
- Can be unlocked by your first play through of the dlc level pack 1 RING OF FIRE.
Now you have both characters unlocked go to the hub and hold the
button and select Aquaman, he can be found on the first row and the 5th token across.
to swop characters and hold the
button again to select Aquaman (Gladiator), who is in the small dlc section at the bottom row 9 and the 2nd token across.
As soon as your characters have been selected in your party, pop achievement unlocked.