Today I found out that whenever you breed Illumise (100% female pokémon) you can get either an Illumise or a Volbeat (which is completely normal), yet the offspring's gender is not something I can decide like with other pokémon.
I'd suggest to get the option to pay for a fee based upon the gender (in this case, also the species) that I'd like Illumise's offspring to be, just like we do we any other pokémon. Not sure if this kind of situation is affecting any other pokémon species, or if it has been already brought to your attention but was not implemented for some reason (if that's the case, it could be useful to know why - Probably balancing? Not sure).
I do thank you in advance for clarifying if this is going to be a possibility in the future, and also for your time reading this thread!