I replaced Gengar's face with ditto's face and removed the watermark on the back.

You may need to change the support z distance and type to get the mouth and eyes to print correctly and have the supports easy to remove.

Avoid supports on the front underbelly as they can cause shrinkage that creates a weird oval shaped depression

Print with infill that will support the bottom of the mouth. Prusa slicer had a bit of difficult with low infil percentages causing the bottom of the mouth to not be solid leading to the mouth support to fall into the model and be irretrievable

File is pretty large because blender freaked out a bit because of how the eye mesh was shaped, and I had to remesh it. You could probably lower the resolution in your slicing software.

2 walls
3 top/bottom
Doesn't need a high percentage infill.