
I got this error and my game crashed. :(
I lost what I think was several hours of progress. At least from the last time I used a Pokemon Center. I was checking my quest log I think when this happened. What is this and why did it happen?

I lost what I think was several hours of progress. At least from the last time I used a Pokemon Center. I was checking my quest log I think when this happened. What is this and why did it happen?
Any fusion recommendations? Or should I self fuse them? Or just not fuse at all?
My character is 16 btw.
Self fused Porygon and got this..................thing.
She's a steel type which resists almost everything to begin with.
She's immune to Poison, Normal, Fighting, and Ground bc of levitate.
The only things I'm vulnerable to are Dark and Ghost. That's it. Everything else is a resistance or immunity. I'm set.
You can get Fresh Water from the merchant near the Fairy Type expert at Mt. Moon for $200 each and it heals 50 HP. The potion heals 20 and the Super potion heals 50 and they cost $200 and $700 respectively.
So I'm curious why anyone would use the potions and super potions when you can get what is essentially a super potion for the price of a regular potion.
I've literally won a few hard battles by chugging Fresh Water until my opponent ran out of super effective moves (when I'm trying to level up a specific mon so I don't wanna switch out).
If I have a self fused Kadabra, do I need 2 Linking Cords to fully evolve it into a self fused Alakazam? Also, is this the same for all trade evolutions e.g. Haunter/Kadabra or Machoke/Graveler?
I really love how when you self fuse a species, the options for sprites can include regional forms of that pokemon. For example, this is a sprite depicting Hisuian Voltorb.
Most of the time it's obvious who the fused Pokemon are, but this just confounds me.
I figure the legendaries can't be alphas, but are there any others?