I strongly recommend splitting this into two BURs, one for each series implication, so that people can vote for each series independently. One BUR should deal with one thing at a time so it's easier to look at your request, verify that there's merit in the update and vote more accurately (or in the case of an admin, deciding to approve or reject).
create implication kunoichi_(game) -> shinobi_(game)
create implication shinobi:_art_of_vengeance -> shinobi_(game)
create implication shinobi_(ps2) -> shinobi_(game)
create implication shin_shinobi_den -> shinobi_(game)
create implication the_super_shinobi_ii -> shinobi_(game)
create implication shadow_dancer -> shinobi_(game)
create implication the_super_shinobi -> shinobi_(game)
create implication shinobi_(arcade) -> shinobi_(game)
create implication yaiba:_ninja_gaiden_z -> ninja_gaiden
create implication ninja_gaiden_ragebound -> ninja_gaiden
create implication ninja_gaiden_sigma -> ninja_gaiden
create implication ninja_gaiden_sigma_2 -> ninja_gaiden
create implication ninja_gaiden_dragon_sword -> ninja_gaiden
create implication ninja_ryuuken_den -> ninja_gaiden
There's two different series handling going on here and thus should be two separate BURs.