Can you "run" from Xerneas or Yveltal?

Question

I accidentally woke one up without having balls.

Answer 1

Yes, it is possible to run away from them in battle.

Comments

Have you been able to catch them after running away?

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I fainted it and could still try again without resetting, so I presume so. Catching it is necessary for the main plot (I think), so they made sure you can get it.

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I expected this, so I took the plunge and ran away from Xerneas XD I then ended up catching it with my first pokeball. A modest Xerneas!