How to perform the "double despawn" in Stage 1

Video showing how to despawn the two enemies that appear immediately after the first water section in Stage 1.  Credit to @rotta885890 for showing me some examples of this trick so we could figure out how it worked.

https://youtu.be/Xjn0BjjK0fI

The Adventures of Bayou Billy Speedrun Tutorial

darbian

MikieDiesAlot

The Adventures of Bayou Billy

Nintendo Entertainment System

LunaTrek

USA / NTSC

JPN / NTSC

Wii U Virtual Console

Can someone explaing what happened here?

Getting the meatball?

Should Bayou Billy and Mad City be separate categories?

NESCardinality

LordKuddy

mrrknight

JSR_

LRock617

Tishero

Name	Author
How to perform the "double despawn" in Stage 1	darbian 3 years ago
The Adventures of Bayou Billy Speedrun Tutorial	MikieDiesAlot 11 months ago