I have an OC, The starman (no official design yet)
When I was on an adventure with my luigi, I fell in a pit, and he didn't try to save me, I found a wierd mushroom growing from thr ground, I ate it in hopes I Could Get out, turns out, It was an offshoot of The Super mushroom and the Poison mushroom, it modified my body to look like this, And I Crawled out and got revenge on everyone I knew.