This patch makes it so you can use the original Bowser fight but have it cut to a sublevel after the fireworks finish. Useful if you want to use the Bowser fight but also have it cut to custom credits or cutscenes. Also useful if you want to use Bowser as a mid boss or something. It can be configured in the asm file to teleport the player to whatever sublevel you want. It is also configured to teleport the player depending on if it is Mario or Luigi (Player 1 or Player 2) to separate levels. Useful if you want to have separate cutscenes depending on the player that defeated Bowser.