Yo, Thursday (we share the same first name. Congrats. :P)!
I'm really glad that you want a Contrary Snivy and am as excited as I am. However, just to let you know, the Master Ball doesn't pass from the mother to her offspring. So you'd just be getting a regular Pokeball, sorry! >.<
If you want a different Pokeball, just tell me! I'm extremely flexible with these things. Send me it via VM, though, as the thread closed due to Powersaving. Don't worry, it'll be open soon, and purified!