Hello, looks like a misprint in kata description:
["TEAM C", "6", "5"]
instead of
["TEAM C", "6", "4"], or
TEAM C won two matches (1x0 and 3x2). Receives 6 points and a total of 4 scored goals.
instead of
TEAM C won two matches (1x0 and 3x2). Receives 6 points and a total of 5 scored goals.

it would be definitely best and short solution with these last 3 lines:

return good > evil ? 'Battle Result: Good triumphs over Evil' :
evil > good ? 'Battle Result: Evil eradicates all trace of Good' :
'Battle Result: No victor on this battle field';

btw great job!

Yes, some tests do not follow these rules. To pass the kata I had to change my solution, because tests form triangles with 0-sides and negative sides (what?)

Javascript language.

Well, I got this one:
STDERR
Traceback (most recent call last):
File "tests.py", line 16, in
test.assert_equals(helper.page_index(0), 0, 'page_index returned incorrect value')
TypeError: 'int' object is not callable

In my IDE all works fine.