Pedantic note:Jasper wrote:I would use the basic werebear stats (though pandas are more related to racoons)
No they're not. Giant pandas are bears. Their closest relative is the spectacled bear. Red pandas, however, are reasonably closely related to raccoons.
Game note:
If you're coming across a werepanda in an Eastern styled campaign, you've effectively given it no weapon resistance at all. I'd give it DR 5/bamboo instead.