Tip: Remaking levels from other Mario games is strongly discouraged, especially popular ones (World 1-1 from SMB or SMB3, for example), as their over-presence in Mario games, official or not, often makes them uninteresting to play.
This sprite will remain stationary until Mario jumps onto it. Then it will start going left or right (depending on its extra bit). The sprite will stop when it hits a wall/an object and will disappear after a few seconds. Overwrites the Mega Mole graphics in SP4.
For further information and customization options, check the ASM file.