Interact with an item and then in the battle screen hit the button while the item is in the zone and turns green.Ī good way to get them all in one go is to head south first, then west past the lasers, then back east up the conveyor belt and north and across to grab the others. Now you'll need to diffuse all the bombs by using the handy bomb diffusing app Alphys put on your phone. A timer will start, but don't worry about it as it can't ever run out. If you go up and to the right a bit you'll come a basketball but any item is fine as they are all, actually, bombs. Once able, move around to the first item you find. This time it seems you are a reporter on the scene.
Once Alphys turns the lights on for you once more, you'll discover you're in another one of Mettaton's TV shows. Now you can head back to the northern door and pass through, once you do so continue east until you find a dark room. This one is more complicated, shuffle the blocks up, left, down, and then fire through one block and once more to shoot the arrow. Now make your way to the left building, Alphys will remove a pesky laser in your way to let you through. Move the blocks down and push one to the side, shoot the block and use your second bullet to get the arrow. This puzzle gives you two bullets so you only need to move one block out of the way. These puzzles have you moving square blocks out of the way so you can shoot the opposing arrow.
Go right first as she instructs into a building. You'll come to another crossroads and Alphys will explain you need to solve puzzles to the left and the right before the northern door will open. Alphys will finally call you and explain that blue lasers need you to remain still in order to not get hurt and orange lasers need you to be moving to pass through safely - use her advice to make your way through the lasers and you can use a switch at the other end to turn them off if you want to go back.