This character is my own creation of a grass-type pokemon. The reason behind his mushrooms are because he uses them as a form of protection. You can see that from the giant one on his head, that is used as a helmet. As for the other small ones, they release a poisonus gas when he feels threatened I have not come up with a name for it yet but I plan to add additions to it in the future, for example evolutions, and new pokemon. I created it in adobe illustrator using vector art. I've used my sketch along with other pokemon reference images

Here's the sketch I used