Special 1-Castle

 is the final and fifth level in Special 1. It is based off World 1-Castle. After completing the level, the player unlocks Luigi as a playable character.

Layout
The player starts out on a platform, and must drop down onto another platform that contains a + Clock. Dropping down two more platforms leads to some rotating gear platforms and a Rectangular Coin Block that contains two Coins and a Statue Leaf. The player then proceeds to a platform that is propelled upwards by lava, and then run across a platform where they must avoid three Lava Bubbles. This leads to a platform where two Hammer Bros. reside; beyond that is a drop down to a lower platform with a Fire Bar, and finally, a platform that contains several Thwomps.

After this is a long narrow walkway that leads to the Dry Bowser fight, where the player must proceed to the switch whilst avoiding Dry Bowser's Fireballs. After defeating Dry Bowser the door to the Fortress opens, leading the player to unlock Luigi, then there's a Warp Box that will lead to the Goal Pole.

Star Medals

 * Star Medal 1: The player must go to the Long ? Block near the Prongo, and then jump to the Long ? Block, where they will find the first Star Medal.
 * Star Medal 2: The player must find an invisible Block with a Super Star, and above it lies the second Star Medal.
 * Star Medal 3: The player must go behind the 2nd Thwomp, and Wall Jump to find the third Star Medal.

Enemies

 * Prongos
 * Lava Bubbles
 * Fire Bars
 * Hammer Bros.
 * Thwomps
 * Boss: Dry Bowser