TequirementsYou will need dlc pack:
Lego Movie Aquaman Level Pack 2If you have the original game 100% complete, ensure your x2-x10 bricks are turned on.
As soon as you smash up your first Lego bricks your
True zvillian Status bar will be filled.
If you don’t just smash up all Lego bricks to try and fill your bar to complete.
From loading into the hub press the
Back button and then press
To:
Level SelectScroll Down to the Level “The Final Battle” *** Spoiler - click to reveal ***Complete this very short level by freeing some sea creatures, defeating some Trench creatures, solving a short power supply puzzle and then moving onto the Sea Vessel.
Once you are aboard Orm will send in a few Murk enemies to defeat along with mashing 
to remove his 6 hearts of live then levels....
Pop achievement unlocked.
Congratulations!
Happy Hunting