# Auto Pilot mode

Intentionally fail a level eight times to unlock Auto Pilot mode. In Auto Pilot mode, Mario will automatically complete a level.
# Title screen star

Successfully complete all levels without unlocking the Super Guide Block (do not die eight times) to unlock a star at the title screen.
# Hint movies

Collect all three Star Coins on a level to unlock the Hint movie for that particular level.
# Hatless Mario

Get 99 lives to have Mario not wear his hat. If you complete a level with 99 lives, Mario will not be wearing a hat at the map screen or the next level. He will wear a hat again if his lives drop below 99.
# Infinite lives

In World 2-4, just past the two Piranha Plants (after the mid-level point) you will come to a staircase with a turtle coming down it. Jump on the turtle just as it is about to go off the third stair (third from the bottom). If done correctly, Mario will continue to jump on the turtle and earn up to 99 lives. If you miss the turtle, go back towards the left and return to the staircase and the turtle will respawn. This is a reference to the original Super Mario Bros., in which you could do the same trick to get unlimited lives.

Go to World 7-4 as Mini Mario. Go through the stage while staying on the left side. You will eventually see a "?" box and a ledge. Jump on the box then to the ledge. Jump off the ledge, making sure to stay against the wall and you will reach a platform with a pipe leading to a red flagpole. You will unlock a 1-Up Mushroom House to the north of World 7-4, which never disappears. You can continue to get 1-Ups until you reach your maximum of 99.

In World 7-5, throw a Koopa shell in-between the two Bullet Bill cannons to get an extra life every four seconds.
# Easy lives

While riding on a Yoshi, jump on the bullets seven or eight times to get extra lives.

Kill eight enemies while using a star to get an extra life. You can keep it going until the star runs out if you are fast enough.

Kill eight enemies with a turtle shell to get an extra life. You can keep hitting the turtle shell until there are no more enemies if you run fast enough.

Jump on seven turtles to get an extra life. You can keep jumping on the turtles until there are no more to jump on if you are fast enough.

Freeze the Pokeies, then do a quick Ground Pound to get at least five extra lives.
# Super Mario Bros. reference

At the end of any stage except Bosses, touch the flag when the last...