well here are my opinions on Useless ninjas ATM:

Shikamaru ( tho only the normal one )
Ino ( also only the normalone )
Shizune ( #whorsthealinthegame )
Kisame (for real he is the whorst ... unless your oponent is AFK and not on auto ...he is just bad )
Shino ( normal one )
Zabuza ( talking about normal zabu, tho he is a loot better than kisame and his clone actualy tanks his mistery only makes him usable in very special teams ... and those aremost of the time not able to compete in pvp )
Enma ( nice in theory ... but just bad in pvp )
Konohamaru and konohamaru corps ( - fanservice characters corps usable for trollteams but just bad )
Asuma ( normal one - he actualy does decent dmg and has a useable chase ...but other f2p characters replace him easily )
Kakuzu ( to squishy for pvp )
Obito ( another fanservice character ... taht has n place in pvp)
Kiba ( if you ever thinkin about using Kiba ...just use GNW kiba )