Persian is in the Field group, I do know that much. And if I had to guess...I would say Cherubi is likely part of the Grass group, but I would do some research just to be sure. Emolga could be Field as well, but I wouldn't take my word for it.

[Though he's not sure if those Pokemon are compatible, either. Hm.]

...Would you like to have a few of my eggs? They would help to expand your breeding pool.