[Question] Looking to improve :) Also backsprite tips?

https://imgur.com/a/WmRJN07
Looking for any feedback, as well as any tips or guides on making backsprites, I'm going to have to start making some, I've only ever done one... and it was not great.

First of all, just gotta say I love the sprites. Some of those mons have a ton of personality. My personal favorites are Rotint and Birdink!

One way I've seen backsprites be made is to flip the sprite, and then reshade it as though it's looking the other direction.

https://www.youtube.com/watch?v=--7fLwoPD8o

This technique is demonstrated in this video here. Hope this helps!