Stage 59

At the start of the stage, go left and box up. You know where the octopee is going to land? Make two boxes between those metal boxes between/below it, so it will be stuck there.
Go back to the starting position. The key is found above you in the box. You will have to destroy the box next to it than do a jump hammer attack on it to release it(can't headbutt the box....) After you got the key, remember the psiroller is freed. Go to the right end of the screen and box yourself up and make sure if the psiroller is just behind you, just turn back and box him first, than later climb up all the way to the top via the right. If you have time, destroy those boxes so that the octopees on the right will land in a wooden box surrounded by metal blocks so that they are stuck and can't move. And besides, destroying more boxes would take the psiroller more time to move, and that is good as you need time later for this delay. Climb all the way to the left and come down. There is an octopee production team there(duh!) Destroy the box with the blue flame and create a box to take its place. REMEMBER, if you stand at the leftmost area, the octopee will not kill you, because it would die before it reach you. Don't release any boxes or the dreaded psiroller will come in. Now as you see, wait for the psiroller to come and he will roll to the right and fall into the gap you prepared for it in the start. That's good, quickly make a box above him and another box on your left/beneath (but quick, you are standing at the octopee producer..) jump up to the metal ledge and that is another part of your victory. Go to the right, collect the freebies and jump down(make sure check the stage-map to see the psiroller) and if the psiroller is not there, jump down to win!