I've watched only the second Rio movie, my favorite character is Blu but I will keep that a secret. But anyway here's a horror story involving Blu.
Blu was flying in a forest all alone to explore in the jungle. He pulls out his pouch and was calculating how far his destination is but it had a hard time getting connection.
"Aw come on, I just got it updated." He fussed, the macaw bird took a break to set up the GPS he stole. But out of the blue, he spotted a glass tube of potion lying on the ground.
"What's this?" He wondered as he flew down to retrieve it, he opens it up the lid with his talons without reading the direction and warnings on it. He dipped his beak in it and slurped it all up until it was empty.
"That was really good," he said to himself. The macaw continued his journey but got stopped as pain laced up in his stomach. He stopped flying and almost crashed into a tree, he landed safely on the ground and he clemched his stomach as he began to transform into a bigger bird. He began to feel a six pack starting to form on his stomach, his legs grew huge muscles as well as his wings grew muscles so he can't fly anymore but he was still a bird but now walk like a human.
"Whats happening?!" He groaned as he began to transform into a anthromorphatic bird.
More muscles popped out from his arms, his groin began to get big as he became well-endowed.
The macaw's wings turned into hands as his pecs grew big and musclular.
He can now walk on two legs like a human, he grew to be 6'3.
"Whoa! Look at this!" He said as he looked at his hands, "I can't believe this, Jewel will love me forever, even Roberto would be jealous of this." He said to himself.
He walked into the forest naked, his tail feathers grew longer as they bobbed behind him. He heard sounds of drilling. This irritated him too, he followed the noise and it was coming from the field that was being cleared out.