That script will faithfully bring the behavior of Chuckya in 2D games like SMBX, I had trried my best to make it like the one in SM64. For more context, here's a showcase GIF:
- Showcase
That script also have many customizable things, here's a list:
- Customizable Things
How to use that script: (You can also see the txt file in the script)
- Spoiler
- This script is uncompatible with 2-player mode, and the NPC is uncompatible with nomove mode. Also, please not put 2 or more Chuckyas in a line like the one in Section 2 of the example level, since it will bring some problems.
Not recommend to use with Toad/Peach/Link.
You should also execute that script via a start event.
That script file includes both lvl file and plx file.
If you not have Magic patcher, the steps are:
1. Open SMBX38A 1.4.5 patch 31.1 or newer version, open the example level via editor.
2. Make sure you have read all notes of that script, then copy all GFX, scripts to your level, and excute it with both NPC scripts and a start event.
With the magic patcher:
1. Download and install Magic Patcher
2. Open Magic Patcher
3. In "Original Level", open the level you want to apply the Chuckya. In "Patch" open the patch.
Download:
- Download
Credits:
- Credits
- Slash-18 - Chuckya Script
Mirror - Graphic for Chuckya
If you have encountered any bugs, feel free to report!
Then, enjoy that script!
and good job! 
