It hurts to put Shujinko on this list because he's a character we spent a lot of time with and he had so much potential.
For those unaware, Shujinko was the protagonist of the unique Konquest Mode in 2004's Mortal Kombat: Deception. The story saw a young boy by the name of Shujinko travel from his monastery to every corner of the Mortal Kombat universe, fighting the iconic stars of the games and learning their moves. It was semi-open world and was the first real attempt at a third-person story mode. Sounds awesome, right?
Well, the mode was kinda boring and, ultimately, Shujinko was an idiotic dullard. The idea was solid but the character just became an amalgamation of every character's moveset with a super generic look. Fans did not take to Shujinko like NetherRealm had hoped, and he hasn't been a playable character since 2006's Armageddon.
Considering the length of time we spent with him, and the fact that he was supposed to be the all-time great, Shujinko can't be considered anything but a total failure the poster-boy of a period that NetherRealm would rather forget.