Stuff in games you can't really use

[Snotnarok]

Cloud in Final Fantasy Tactics on PS1. He's the last character you get and by that time he's level 1 while your party is 50-60. So, it turns into a task to level him up only to be able to have him in only the final maps. It's pretty lame considering he's fun to use.

If characters don't count. .....The Materia Blade

 

[MercurySteam]

Switching between left arm and right arm shooting in games by High Moon Studios. I understand it has to do with maybe getting a better angle but never needed to use the darn thing.