To unlock the Think outside the box trophy in WWE 2K19, you need to grab an opponent and put them through the cell wall in a Hell in a Cell match.
First off you should update the main gameplay options, set the difficulty to Easy and the Weight to Simulation, Reversal Limit off. Now set up a Hell in a Cell match.
Pick a Heavyweight and make sure you are up against a Cruiserweight so you have the weight advantage.
In the match, get outside the ring with your opponent and punch them towards a cell wall. Now you need to throw them at the wall with
. Face the wall and perform an OMG (hold
and press
. If done correctly you should lift the opponent and smash them through the wall.
Here's an excellent video guide from Poru99: