They are based on Lucy Ravensar’s designs, you can check out her patterns here. She has pretty much any Star Wars character you could possibly want to make, it’s awesome!
My brother and I were/still are obsessed with that movie, and we played it all the time growing up. Because of my dino nostalgia, I decided that I wanted to make his gift this year instead of buying one and thought a little amigurumi dinosaur would be perfect! I searched through a lot of patterns but had a hard time finding one I actually liked until I stumbled onto this pattern which ended up working perfectly.