You are NOT "mining XVG".
You are mining Lyra2v2 and collecting a pay-out in XVG. Any ninja/mona/vert coins mined by the pool are split among the pool members, and your share is paid to you as XVG.
Look at it like this: You (and a thousand other people) are digging in a hillside that potentially contains gold, silver, and aluminum. Whatever you happen to find gets sold @market and split among all the people. You've opted to get paid in gold. You don't get any silver or aluminum. You could, if you like, opt to be paid in mushrooms... but that presumes that someone on another hillside in Zpoolville is mining mushrooms.
Thanks thats helpful.. So could I mine any of the available algos on the pool such as "blakecoin" and get paid out in XVG?
Yes, as long as there's enough XVG being mined by the pool to pay you.
f.ex.: Nobody on Zpool mines Ethereum, so you can't be paid in ETH.
Zpool will not go to an exchange and buy a particular coin to pay you if its short. The only thing Zpool "fetches" is bitcoin.