I'm thinking of changing one of my pet's color to galactic. Could someone please list all of the crystals that Iltallo might ask for in exchange for blessing my pet? I would also like the cheapest price for each crystal if possible. :)

Here is the full list, they're all very, very cheap (like worthlessly cheap). But you can get them for free by digging in the caves on the 6th-7th of each month if you'd rather wait anyway.

The same caves where you can ask for your pet to be blessed?

If so, where do I go to dig for the crystals?

It's the same place, but the cave where you can dig only shows up during the time of month when you can dig.

Yes, the same place, but like I said above, it's only available on the 6th + 7th of every month. The most expensive crystal is under 300 sP though, so you're honestly probably better off buying them and getting it over with

Can Iltallo turn my pet galactic even if it isn't the 6th or 7th of the month?

Yes c:

Yay! Thanks! :)

you can also get achievements for digging in the caves