Want to learn how to get alot of 1-Ups well in Super Mario 3D World you go to level 1-2 you will find near the start of the underground level that there is a koopa troopa and two brick blocks on the ground so ground pound and there will be a small room with a koopa troopa and a small exit grab the koopa shell go to the front of the exit throw your shell jump and you will start to get 1-ups yeahplz