This Chameleon is articulated with 21 joints. The body parts can move up, down, left, or right. Forearms move side-to-side, arms move in all directions, and hands can move up and down.
The 3MF files were made in Bambu Studio and may not open in all slicers. I recommend using the STL file if you are unsure if your slicer will open the 3MF.
You can print it smaller, but for best results print it at the provided size. You can print it bigger for a greater range of movement, and at a higher quality to see all the details in the model better.
I print it without a brim in PLA just fine. So long as your hotbed is clean/freshly glued you shouldn't have any issues.
Do not print it with supports; it does not need them, and can damage the model when you try removing it from the supports!
The range of movement can be seen in the video.
This file covers PERSONAL printing use. If you would like to sell prints, please join the "Commerical License" tier of my Patreon: https://www.patreon.com/thomastedwards