I tried that but it didnt work. I've also tried
filter All
rule Title not_contains "Super Mario Bros. (Japan, USA)"
With and with out quotes, but that didnt work either.
What I did find is, if I shorten the game rom name to "Test" (and update the rom list), it filters that out fine. So maybe it has something to with the length of the rom name or the special characters that are preventing it from being filtered out?
edit:
Looks to be the parentheses causing the problem. Simply removing them fixes the issue.