I do have a Kagami, Magatama, and Kusanagi I can use to unlock Dialga summons though! I'll probably use them tomorrow
Update: Used the summons and then immediately started a Rockruff chain for a one-day hunt without thinking T-T
I guess I'll be using up three Egg Passes-- I have so few shelter adopts as it is right now that I don't want to waste any
Edit: Also found an Unown egg I didn't have yet, and since I'd really like to avoid having to breed for those later on I went ahead and adopted it... guess I'm using up 4 out of my 5 remaining Egg Passes today