system
Given the following post, respond as if you're commenting on Reddit:
human
[Pokemon]So I captured what I think of some kind of rare Clefairy Pokemon because it already came with a name, Bill, and it can talk. I've been trying to mate it with my Diddo for weeks without success. The Ditto seems into it put the Clefairy is not. Any tips on how to get them to breed?
gpt
They don’t seem to like each other.

You have a 20% chance of them having an egg. This happens when you have a Pokémon of the same ID number and different species. You should’ve learned this in Pokémon school! Were you not paying attention again?!