If you want a ton of lives, then its easy! First hit that koopa and grab its shell. (Don't forget to kill it) Then go to the entrance of the hole. Next make sure you are inside and then get close but not that close to the line. Finally throw the shell then immediately jump then BOOM you get a ton of lives! (Takes a long time though but its only about...... 200-250 secs then you got a ton of lives)