I have a character who has a special mount that also counts as an animal companion, per the Devoted Tracker feat from Complete Adventurer.
Is there any way of gaining the share powers ability (as found e.g. on psicrystals) on such a creature? Specifically, I am interested in being able to duplicate manifestations of my psionic powers on my mount—vigor for the both of us, mirrored share pain, and so on. Merely giving my mount the ability to use psionic powers itself is not useful for this purpose.
I do have some ideas on what an answer might look like, but I don’t know of any options for accomplishing them. Maybe make it count as a psicrystal, or embed a psicrystal in one. Or maybe a psionic nature-type class exists that does something like this? I suppose one might also be able to make a case for the magic mantle; if you feel like wading into those waters, have at.
You can assume psionic–magic transparency, but note that I’m pretty sure that those rules don’t cover the share spells feature that the companion/mount already has—anyone claiming they do would have to make that case very thoroughly and very strictly in accordance with RAW. But if it helps with any other aspect of your suggestion, psionic–magic transparency applies.
Also, note that Devoted Tracker enforces that particular order of operations: you must start with a special mount, and make that count as an animal companion. You cannot make an animal companion count as a special mount. Getting a new companion/mount for this purpose is fine (I’ll just refluff it anyway), but it has to be a mount first.
I am primarily interested in Wizards of the Coast content, Paizo content (including 3.5e Dragon/Dungeon), or Dreamscarred Press content.