This patch allows you to insert custom extended, cluster, minor extended, bounce, score, smoke, and spinning coin sprites all in one patch. It includes a few subroutines (speed updating, clipping, and the like) for them as well.
I really like this patch, as the description says, it lets you to insert some other sprites that doesn't waste sprite slots. It only comes with subroutines, so only advanced users would take advantage on this patch.
I've made a fix regarding spinning coins, they were glitching when you spawn them very fast because the SMW routine for spawning spinning coins only increases the spinning coin number instead of setting a fixed value.