riddle

Q: How many people with ADD does it take to change a lightbulb?
A: HEY! Let’s ride bikes!!!

equivalent to what?

I was thinking about the Fistful of Dollars and For a Few Dollars More movies, which were remakes of Yojimbo and Sanjuro. And then I thought about The Magnificent Seven and Seven Samurai. And then I thought:

if
samurai = cowboy
then
ninja = ???

Elvis Presley should have been cast as the ninja-analog character in at least one 50s Western. Just for the costume.