Sunshine Blooper: https://www.smwcentral.net/?p=section&a=details&id=25993
The idea is pretty much to have him chase mario throughout the level while constantly attacking him.
Make his projectile go through everything, pretty much like how bowser statue fireball behave.
Increase the range at which he keeps following/attacking Mario.
The image below shows that if mario is too high he will ignore him.

If you desire to make those customizable or as an option is up to you.
The idea is pretty much to have him chase mario throughout the level while constantly attacking him.
Make his projectile go through everything, pretty much like how bowser statue fireball behave.
Increase the range at which he keeps following/attacking Mario.
The image below shows that if mario is too high he will ignore him.

If you desire to make those customizable or as an option is up to you.