THIS IS A PERSONAL CONCEPT FOR THE OVAL CHARM'S OBTAINING METHOD.
MAY OR MAY NOT BE PUT INTO THE MOD.
I noticed the Oval Charm is currently unobtainable, even with commands. As It increases egg production in the games, I have a few Ideas for the method of obtaining it.
1. 1/3 of pokedex Filled
This may be a more harder option for the player to fufill, but would reward them for collecting pokemon, as well as leading them to filling the pokedex- and getting the Shiny Charm.
2. Egg Hatching Counter
This is a bit more of an odd choice, which Is understandable. This option would require the player to hatch a certain amount of eggs before getting the Oval Charm, and this would relate to the function of the Charm.
This option is most likely to be added nonetheless, but it is the only one requiring command access. Only reason I mention it is because of the command for the Shiny Charm. (That being /shinycharm)
This is just a few of my ideas for methods of Oval Charm Obtaining.