Most people associate Built-In Scratch sprites to be for beginner projects and very basic games. However, Scratchin Crew is different. It is a full 3-stage Cuphead inspired bossfight where you must defeat 3 characters from the Scratch sprite catalog. Each phase is meant to represent category in the “choose sprite” menu. The final stage features all categories. The sounds are also from Scratch's built ins, so unfortunately there is no boss music
With that, go see if you can defeat the stages without losing 5hp!
https://scratch.mit.edu/projects/1209369637/