Every blind bag pony you own at this very moment immediately turns into a flesh-and-blood pony with the exact voice and personality as they do on the show. But they retain their tiny size!

However, any significant injury (falling, being stepped on, microwaved) will turn them back into a lifeless toy, and the others will mourn as if that pony had died.

How many ponies do you have living with you now? And, more importantly, had you stored them someplace safe beforehand... ?