Bowser Dram

From SMO.wiki

Bowser Dram is a capture warp that requires timing whose purpose is to collect the From the Side Above the Castle Gate moon while Cappy homes in on the spark pylon to get to the next island. This trick saves time in Any%.

Execution

After collecting the second story moon, make your way to the railing or a high point, throw Cappy, dive on the platform to the side of the castle, dive once more, then finally roll boost at the last second to obtain the moon and home Cappy into the spark pylon in order to get to the next island, then the boss fights via another spark pylon.