Considering how Terapagos broke the master ball in the DLC, could be possible for Meau to break free from one?
Terapagos was technically captured by the ball, but due to outside sources it was able to break the ball, not break out.
Which I think is a HUGE difference, given it was surrounded by the Tera crystals and their energy; it had a lot more power to work with outside of just itself. So hypothetically, if Meau was shoved into a masterball, but then surrounded by immense outside harnessable energy she could very likely pull off the same thing.
The chances of that happening tho are a different story, because the capture rate is still guaranteed! However the sturdiness of the ball is a different status entirely. So it’s very dependent I think ;3