Super Mario World 2: Yoshi's Island

Bonus game

Hold Select and press X(2), Y, B, A on any stage select (map) screen. The bonus game will begin when Select is released.

999 lives

Enter World 4-1 find the two long pipes that are hanging upside down. Kill the Piranha Plants, then swallow Shy Guys until accumulating six eggs. Grab a Koopa Troopa, and stand on the pipe that previously held the lower Piranha Plant. Spit out the shell between the two lower pipes. As the shell bounces back and forth, throw away an egg. Shy Guys will appear from the other pipe and will be hit by the shell until extra lives appear.