Ballspark. With this you can shinespark as a morph ball, but only if you have the Spring Ball.

The implementation is a bit hackish, the proper way would have been to create new entries in the transition, animation and delay tables but that involves moving a lot of code. Right now it tricks the game thinking it's a regular shinespark, but loads the values that would correspond to a morphball. The downside is that there are a lot of comparisons.

The file ballspark-main.asm enables the move. If you use Project Base or the patch that lets you continue running if you hit a slope while shinesparking, apply ballspark-slopes.asm as well.