don't mutate the input. Do NEVER mutate the input...

And wen posting about possible issues, please document them correctly (as Seigo did):

• language
• input
• actual
• expected

Same problem with should work test.

For:

moves = ["right", "right", "right", "right", "right", "down", "left", "down", "down", "up", "down", "up", "left", "right", "right", "up"];

Should return:

["E.Honda", "Blanka", "Guile", "Balrog", "Vega", "M.Bison", "Sagat", "Sagat", "Sagat", "Balrog", "Sagat", "Balrog", "Guile", "Balrog", "Vega", "Vega"]

My function returns correct value

I had the same problem, then I realized the instructions are confusing.

If you submit your code to return either true or false, it'll work. the problem is for true I was returning '...is narcissistic'.