Billy was the first to change.
First, Billy's hands transformed from five digits fingers to three digits fingers.
Then, a short stumpy tail popped outta his pants.
His footwear disappeared, revealing his bare feet had 2 toes on the feet, with sharp clawed nails, then the rest of his clothes vanished.
His eyes became a cyclops eye, then he gained 2 blue tentacles under his arms, and then, he gained big pointy ears, and his teeth became sharp, and his lower jaw pushed out, giving him an underbite.
Finally, his body turned a pale cream colour, with the exceptions of his hands and feet - his feet turned purple, and his hands turned cyan.
To finish off, black short spikes grew on his head, briwn similar spikes grew on his back, and his hair turned neon blue.
Billy was a monster!