This is one of my favorites I've generated. I have got pretty good fusions.
I'm making a Pokémon fan game and tried using that fusion generator. It's a given these will need some work to have fewer artifacts and more personality.
Got some pretty cool fusions, which one is what I realized on my own, but found fusion bonds to bring that out easier than on my own. I want to add a Crystal type, which is more specific and beneficial to do so. So I want to make it its own type. Despite some crystals being delicate, they can also be sharp, which could counter a Fighting-type move.
This idea is coming from how to work with Aerodactyl, and I realized a theory it might have been pretty heavy kind of type. Other than steel crystal makes sense to me, even though for Diancie it is summed up as being rock and fairy for a fairy sitting up on a floating rock. At least based on what I felt when it was fused with for Clefairy. Lunatone and Solrock also do look good, but only on one side of each spectrum with Diancee.
Where crystal could make sense for Aerodactyl, for how those may have deteriorated from a greater element. Could be part of an element like of the First Gen bird trio and maybe their orbs.
There is already some Prism Pokémon, so maybe that is likely they will be more varied between the Rock, Steel, and Ground kinds of Pokémon. Using Solosis and Diancie on some fusions along with some interesting unrealited combinations like with Solosis and Gothitelle, to experiment on this type, but I cannot fully conceptualize these by myself.