Mr. Dinkles is Biggie's pet worm from the film Trolls. Biggie likes to dress him up in many outfits and take multiple pictures of him in them. He has a squeaky voice and only says, "mew", except for once in the film where he exclaims in a deep voice, "Oh, Snap!". This surprised the Snack Pack, including Biggie. He wears a little green hat, aside from the outfits Biggie puts on him at the beginning of the movie.
In the upcoming Trolls: World Tour, Mr Dinkles spoke in a deep voice again. He counts 1,2,3,4 accordingly in haste for rhythm. He then gets pulled at an unreasonably long length in the County area of the Trolls universe. Soon, his head is (somehow) set on fire. Biggie places a hand on his burning head. It instantly extinguishes the fire, leaving both unharmed. He also barks along with Biggie, Branch and Poppy while the trolls sang 'Who Let The Dogs Out'. Later in the film, Mr Dinkles' hat is pulled. He then emits air from his mouth. Biggie uses that ability to use Mr Dinkles like a boat to veer them away from Poppy, Branch, and Hickory. He almost eats a wooden stake.
In one promo, captions say Mr. Dinkles says "Neep." when hey says "Meep."