How do I do a turnbuckle?

This is probably for 07, but here goes.

Just go up to the turnbuckle, and press 'X', and your character should expose the turnbuckle.

Use 'Triangle' to run toward and climb up onto the turnbuckle.

To take off the turnbuckle you stand facing the turnbuckle and you press whatever button you use to go outside the ring (You might have chosen different controls to me)

If you mean do a move in a turnbuckle, irish whip your opponent and press circle. For other moves, press circle + directional pad. If you mean do a aerial attack while standing in a turnbuckle, target the downed opponent then press x too. Same goes if you want other moves, press circle + directional pad. I wish this helps.

To remove the turnbuckle you have to face the direction of the turnbuckle and press x.

Go to the turnbuckle and press x but makesure that you are like walking straight into it then press x.