I know I tried as well. All I can find is "genderless" "legendaries" and stuff like that but since I'm far from knowing which one is genderless or legendary, it doesn't help me, which is why I wanted a sort of alphabetic list of unbreedable pokémons ;___;
All of the baby Pokemon, and Pokemon without a gender, cannot breed with another Pokemon EXCEPT with a Ditto/
To list some of the baby Pokemon: Azurill,
Togepi
Pichu
Cleffa
Igglubuff
Riolu
Elekid
Magby
, Wynaut
, Budew
, Happiny
, Bonsly
, Munchlax,
Mantyke,
Mime Jr.
, Chingling,
Tyrogue
Kurokami
Sleepyhead...
Towns Folk
#8
Baby pokemon, legends, ditto, non genders(except with ditto), and cosplay pikachu. I think that's all.
Here are links to them: Undiscovered Gender unknown
Tri-force64
An Incomplete Joke
Towns Folk
#9
I think some Pokemon in a certain group(can't remember the name) like Metagross can't breed.