I am in the process of typing up the pattern that I made up. I have taken bits from the original, but changed lots as I think mine is a bit bigger than the original. I'll post the pattern when I get it done.
EDIT: Here is the pattern I used. If you use it in conjunction with the original post it may actually make sense. I apologise if it's hard to read, but this is my first crochet pattern and I am new to amigurumi. If anything doesn't make sense please let me know and I will try to explain. The head is just plain tricky and I did a bit to just make it work. I have tried to add explanations in the pattern too. First time linking a PDF as well so let me know if there are any issues.
Gizmo Crochet Pattern
|Finished Crochet Mogwai|
|Before arms and legs|
|Back - next time I wouldn't do the white as high up the back|
|Side/top view to show the hands|