I dont know if its possible to evolve pokemons in PokeMMO without having to trade in exception of those that requires a stone/item that are currently available to use it and evolves like Slowking for example.
The pokemons like Kadabra, Hunter, Machoke and any other that evolves via trading only should add in game a system, computer, item or a new character in pokemon centers as the guys that re-learn/eliminate moves but in this case to evolve those specific pokemons.
The problem comes when breeding a 5x31 or 6x31 pokemon that evolves only via trading.
If the game already has this system plz where is it? Cuz I dont find info anywhere on the explorer and forums search bar. If it doesnt have it on PokeMMO please I suggest to consider adding it.