Would I be allowed to use the Fakemon in this in my own project thing?

I came here to learn some infomation on pokemon not osme nknock of

What Starter would you pick in Umbra and why? is it because of their moveset, their looks, their type, or I-have-to-choose-this-because-I-want-to-use-that-other-mon-with-the-types-of-the-other-two-starter-?