Mario hidden checkpoint tutorial

Before 1-2 leads to the water pipe on the ground, you need to leave the rightmost brick next to the water pipe and jump with your back to the water pipe, so that Mario's head can touch the brick during the jump. It usually takes only a few attempts to get through the water pipe and get Mario stuck in the wall. Next, you need the player's hand speed, in "Welcome to the warp zone!" Before the text appears, quickly enter the water pipe on the left or right, and the water pipe in the middle is a shortcut of "5- 1". In this state, when you walk into the selected water pipe, the level actually becomes "-1", which means that you have successfully entered the legendary dream level.