>>50322094Eggs are made of multiple materials.
We weren't told how they're made but the Gen 2 zukan has Elm speculating they're brought up. with the most common theory being Celebi.
>Do pokemon reproduce by combining this energies to make an egg appear?No, reproduction appears to be an unrelated process. The gen 1 zukan states nidoqueen and nidorina can't breed, but in the gen 2 one its a mistery why they can't produce eggs at the daycare.
