I've made a random pokemon generator for pokefusions that picks them based on their combined score :3>
Includes all 1008 pokemon, plus megas, gigantamax, variants, etc.

So that if you get one "bad" pokemon on the left, you'll get one "good" pokemon on the right🙌

Scores are in the B/E form, the first number is how good it is a Base, and the second is if it has good design elements. Ranging from 0 to 6.
The only missing formes are of those pokemon with more than 4 (furfrou, vivillon, unown, etc).

Made for fun, It's really rough but it works I suppose. Give it a go!

https://elpatrixf.com/pokefusion

EDIT:
I made two other things, using the same dataset:

A barebones "would you rather" website, where you have to pick either A or B.
http://elpatrixf.com/poke/wouldyourather

And obviously, a SMASH or PASS, featuring all the pokemon, and all formes.
http://elpatrixf.com/poke/smashorpass