I thought about a nice idea, i guess.
Why not creating exclusive mounts ? which would introduce a craft system
For exemple, think a mount to be an extreme feature which needs one month of farm (like in actual korean MMOs, like BnS which needs about one year to complete a full equipment without legendaries)
Also, maybe a craft system which special items of pokémons could be farmable also and would take about one week / item or something like that.
Let's discuss !
(I always loved crafts system which needed extreme farm :>)