I pretty agree with it, so I'm sharing it to be read, here we have amazing tips and some rules done by the amazing MyMarshlands (https://www.deviantart.com/mymarshlands).
"I think one of the most important things on fakemon as for now is CONCEPT
If I made a tutorial on how to do fakemon I'd DEFINATELY cover not to do like a grass monkey or an ice penguin. IMO you should get a good conept before sketching the fakemon, either way you end up "forcing" the design and make it look uninteresting and sometimes pretty forgetable.
Also I think the overral technic IS important, but not THE most important. There are fakemon that look pretty good despite not done in a perfect sugimori style