If this is as in GSC, then the HP IV is decided from whether the other ones are odd or even: it is 0, plus 8 if the Attack one is odd, plus 4 if the Defense one is odd, plus 2 if the Speed one is odd, plus 1 if the Special one is odd. So they are 11 for Mosqueton, 3 for Sally, 8 for Mr. Vampiro...