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There are many ways to complete this level, so choose whatever route works for you. The midway point is skipped so that you can stay as small Mario, which will make the first jump in Iggy's Castle easier. In order to get the optimal time of 361, you must jump onto the yellow blocks surrounding a p-switch, and once you reach the far right edge hit and hold jump, let go of the d-pad while you are in the air. If the category you are running requires Yoshi, you can get him from the second of the pair of ? blocks near the start of the levle. A common strategy with Yoshi is to put a shell in his mouth while running so he doesn't slow down while running past berries.
Video Comments:Source: MiBramz
11 Exit
The most optimal route for 11 Exit is to grab the Cloud glitch item in this level, then carry it all the way to the Bowser fight to manipulate Bowser's AI.
Classic Cloud
Video Comments:Source: Lambby
Scrolless Cloud
Video Comments:Source: Dotsarecoolp
Lunar Dragon
Use Yoshi to give yourself an extra boost to collect the fourth Dragon Coin instead of using the vine for a small time save.