Sky Pillar said:
Ninja can imply fighting-type, remember the dark-type is the evil-type in japan. Ninjas can be honorary fighters or dastardly ones, they aren't always evil
Not really, fighting type involves physical brute strength, and close quarters combat, while ninjas do none of that. Dark moves are no longer necessarily only evil, but sneaky as well. Sneak attacks belong in the dark type, not the fighting type, like pursuit. The fighting type is all about honor, and fighting fair, and when you are a ninja, there is no such thing as being fair.
So Ninjas are 0% fighting, and if you are a ninja using the "fighting" style, then you aren't a ninja at all.
If you put this in RPG style, Fighting types are Fighters (today, we call them Warriors), Psychic types are Mages, and Dark types are Thieves, that is, the Figher, Mage, Thief.
I think you are just confusing Ninjas with Samurais. Samurais are more like the Fighting type, while Ninjas are more like the Dark type.
Any move that would be associated to a the Thief/Assassin/Rogue class in other RPG's are always Dark type moves in Pokemon.