I belive it would be a Porydrio, if you follow the official pokemon fusion website.
Do you want me to alter any of the heads to look like a porygon head, or do you just want a compleatly new color scheme for the dodrio? They would both look fine. The website has the center head altered, but it world still be epic with just a blocky texture and color change.
Do you want me to make it more realistic, or do you want me to stick to the oridgional design closly? If you have seen my other pokemon fusion paintings then you may have noticed that I keep them pretty similer. I can use as much artistic liscense on this as you wish.
I will start messing around on it today, and if Im really happy with it, it may be done this weekend! It seems like a great project!