For the specials, the JP ones that dont summon the Stand (they are the closest thing to Beach Boy) and some more random stuff. For the supers: -JP level 1 "Chornobog" -Cammy Lvl 2 "Killer Bee Spin" -Jp lvl 3 "Interdiction" So hes basically a Standless JP
Not sure if you just have to keep playing the story or just get to max level (20) with one master/teacher. Do you have any master at level 20? You can see it on the status on your phone