Originally in the NES Version of Mario's Time Machine, these Ground Pound Koopas will try to stun you by pounding to the ground. There are four variants that are shown in the video below with each variants showing how they work.
Credits
Script By TheOrangeToad
Thanks to Slash-18 for the hovering code which was originally used for his Flying Spiny script that I'd modfily for my script.
Erik (On SMW Central) for the original inspiration for this script.
A big bubble from Super Mario World that hovers in wave motion. I'll only really made this because the Yellow Parakoopa script that I've made above behaves almost the same way but slower and with a better hitbox.