Inspired by a type of bee encountered at Wario Land 2, this bee starts moving in a sinusoidal-like pattern. When Mario gets into a customisable vertical and horizontal range, the bee stops moving some frames and then starts following Mario.
The download includes the original WL2 graphics, recolored to fit the Super Mario World style.
This sprite does not work well with upside down slopes, so take that into account when planning setups with it.
Updated with a better screenshot, PIXI version and slightly better code.