Ever since Super Mario Odyssey premiered at E3, there's been a small demand online for amiibo figures of the Mario-possessed enemies. You know, the ones where you see a Bullet Bill with a Mario hat and mustache. Well, one YouTuber has a solution for you to get one now rather than waiting for it to be made.
GandaKris has a series on her channel about making DIY amiibos that are custom figures Nintendo has never made, and in some cases, probably will never make. She's created figurines that look like a dog version of the Nintendo Switch, a Cappy Boo, and a GandaKris. The video below will show you where to final all the materials you need to create the figure and make your friends totally jealous of it and wonder how you got a hold of it so soon.
I think it would be a safe bet that somewhere down the road, Nintendo might actually make the Mario T-Rex, but this is a nice replica to make for your own collection for the moment if you're into crafts. GandaKris also has an impressive DIY channel where you can learn to make all sorts of geeky video game stuff, so it might be fun to explore and see what else she has if you're not into this one.