Vanish Cap

From the Super Mario Wiki

The item, the Vanish Cap.

The box in which the vanish cap comes from.

The Vanish Cap is a cap that when worn by Mario in Super Mario 64 , turns him temporarily into Vanish Mario. In this form Mario can walk through metal fences and certain walls. Mario must first press the blue ! Switch in order to activate the blue blocks which contain vanish caps. It is mainly used in the Big Boo's Haunt level.

The Vanish Cap is found only in Super Mario 64. In the DS version, Luigi can use the power granted by the vanish cap, though the Vanish Cap itself is absent.

The item is actually a translucent version of Mario's Hat.

Courses and Mini-Stages of Super Mario 64 and Super Mario 64 DS
Bob-omb Battlefield \| Whomp's Fortress \| Jolly Roger Bay \| Cool, Cool Mountain \| Big Boo's Haunt \| Hazy Maze Cave \| Lethal Lava Land \| Shifting Sand Land \| Dire, Dire Docks \| Snowman's Land \| Wet-Dry World \| Tall, Tall Mountain \| Tiny-Huge Island \| Tick Tock Clock \| Rainbow Ride \| Tower of the Wing Cap \| Vanish Cap Under the Moat \| Cavern of the Metal Cap \| The Princess's Secret Slide \| The Secret Aquarium \| Wing Mario Over the Rainbow \| Bowser in the Dark World \| Bowser in the Fire Sea \| Bowser in the Sky \| Roof \| Sunshine Isles \| Battle Fort \| Goomboss Battle \| Big Boo Battle \| Chief Chilly Challenge
Super Mario 64 and Super Mario 64 DS Items
Power Star \| Gold Coin \| Blue Coin \| Red Coin \| Silver Star \| 1-Up Mushroom \| Mushroom \| Power Flower \| Wing Cap \| Vanish Cap \| Metal Cap
Super Mario 64 and Super Mario 64 DS Objects and Obstacles
Bill Blaster \| ! Block \| ! Switch \| ? Block \| ? Switch \| Blue Coin Block \| Crystal Tap \| Green Shell \| Cannon \| Star Marker \| Crazed Crate \| Donut Lift \| Lava \| Pushy Walls \| Pyro Box \| Spinning Heart \| Treasure Box