So this is mainly focused on the middle evolution
But here are descriptions of all of them

Pipsqueak: pokedex info:Pipsqeak are aggressive, and they love to sharpen their teeth, unfortunately, they don't know how and end up making their teeth so dull that can't even break fabric.
Colors: most of their body is neon green, it's eyes black, and it has little patches of red
Moves: leer/scratch/ wing attack/wrap
Cheng
(Meaning: Scales, in chinese)
Pokedex: On most morning when the sun has barely risen, sillouetes of Cheng can be seen in the sky, and that is usually the only time they are spotted. In battle, when it unfolds it's wings, it sends a mass of feathers in the air, which provide energy.
Colors: dark green with spots of brown
Moves: Wing attack/Dragon tail/ perish song/ poison tail
Chen
(Meaning:old in Chinese)
Pokedex: Chen are extremely wise but very understanding despite their intimidating looks and sharp teeth.
When battling, they will sometimes dig underground.
Moves: Draco meteor/ poison tail/ Dig/ Perish Song