20! And it's definitely stronger! I've read strategies about people who use really really strong ones, because they have an ability called Guts which makes them more powerful if they're poisoned or burned...but then, they use a move called Facade on top of that, which does a lot of damage if they're poisoned or burned! And from there they can take down most opponents, especially after a Super Fang!

But, that way of fighting's not really my type of strategy...