In Blitzball I have seen people do volleys and corkscrew shots. Is there..

You need to tech copy these moves off of a player that knows them. For most techcopies to work, you need to know from 1-3 of the player's key abilities.Biggs, (who starts off as a free agent) is the player you want to find to easily learn all 3 levels of volley shot, however, you need to wait until another team hires him to techcopy off of him. Datto(Besaid aurochs) and Diem (Kilika beasts) also know all three levels, but Datto must first be traded off of your team onto an opposing one. Keep an eye out for the following players to tech copy Volley shot off of, but unfortuantely, I hae no idea what you mean by corkscrew shot.

Volley Shot 1 is learnable from Abus, Argai Ronso, Basik Ronso, Bickson,Biggs, Blappa, Datto, Diem, Eigaar, Gazna Ronso, Isken, Kiyuri, Kulukan, Kyou, Lakkam,Larbeight, Linna, Mep, Miyu, Navara Guado, Nedus, Nizarut,Nuvy Ronso, Pah Guado, Svanda, Tatts, Vilucha, Wedge,Zazi Guado, Zev Ronso

Volley Shot 2 is most easily learned from Bickson, Biggs, Blappa, Datto, Diem, Kulukan, Larbeight, Linna, Nizarut, or Zev Ronso. Volley Shot 3 is most easily learned from Biggs,Datto, or Diem.