Wooloo appeared in the demo where all mons were set to Lv. 50. You were able to view the stats and nature, everything really, except for IV/EV, but we can safely assume no EVs and perfect IVs (because why not). There is a chance they put random IVs but even then we got a very good estimate.

So here are the base stats
66/33/48/33/38/41

Unfortunately this does mean that Wooloo will get an evolution, which I was hoping wouldn't happen, because they will likely screw up the design like they did with Mareeps line.