Katanas
To make these first you need to make a handle and a blade
handle –
= leather
blade –
Then you must fortify the blade by smelting it.
After you get your fortified blade, simply place the blade on top of the handle and you get a katana! They have the stats of an iron sword. (may be subject to change now that I can make new Tool enums with forge)
– me killing a ninja with a katana
Shuriken/Gauntlet types
Normal:
Shurikens:
crafted by:
gives you 4 shurikens
Shurikens can be launched from Gauntlets.
Gauntlets
crafted by:
= leather
Gauntlets, as said earlier, are used to shoot Shurikens.
– shuriken
Fire
Burning Shurikens
Lights mobs they hit on fire, lights whatever they hit on fire.
Made by smelting a Shuriken.
– fire from flaming shurikenFire Gauntlets
used for… you guessed it! Shooting the flaming Shurikens.
made by smelting a Gauntlet.
Explosives
Explosive Shurikens
they make explosions smaller than tnt, and will kill most mobs they hit in the first shot. If you hit a creeper with these the explosion will be bigger.
– crafting, doesnt matter where you put the items
Explosive Gauntlets
I think you’ve got it by now, these shoot the explosive shurikens.
– crafting, doesnt matter where you put the items
Super Explosives
Super Explosive Shurikens:
These make a blast the size of tnt. Will also kill most mobs they hit. You DO NOT want to hit a creeper with these…
If you hit a creeper with one of these it will make an explosion the size of 8F. To know what that means, tnt is 4F.
– crafting, doesnt matter where you put the items
Super Explosive Gauntlets
You know what these do.
– crafting, doesnt matter where you put the items
– damage from tnt and explosive shurikens XD
Kunais
throwing knifes, damage of wooden sword when used like a sword, can be thrown for iron sword damage, does not take damage but can not be picked up once thrown, stackable
crafting:
make blade fragments
smelt iron
make a grip (handle)
make a kunai (this recipe now makes 2 kunais)
Then throw them 
Ninja Armor
the items you don’t recognize are ninja cloth scraps
all armor is equivalent to leather armor in protection, excluding its special effects
Ninja Helmet – allows you to breath underwater forever while wearing
Ninja Tunic – makes you immune to fire while wearing
Ninja Pants – makes you move faster while wearing
Ninja Boots – remove fall damage while wearing
NINJAS!
All ninjas drop ninja cloth scraps as a “rare” drop, like skeletons that drop bows
Basic Ninjas
Shoots shurikens at you, spawn at night in forests, taigas, and swamps, drop shurikens and gauntlets when killed
ninja doing nothing (from 1.0)
ninja shooting me
Exploder Ninjas
Shoots explosive shurikens at you, spawns at night in forests, taigas, and swamps, drops gunpowder and explosive shurikens when killed.
shooting an exploder ninja while a normal ninja looks at me
Rouge Ninjas
Shoots burning shurikens at you, sometimes shoots normal shurikens, spawns at night in desert, drops burning shurikens and flint when killed.
Payable Ninjas
They spawn in black huts! And… they also talk!
They will protect you like wolves, and they don’t move until you tame them or start destroying their house (they might move before that but I don’t think they will)pictures, gives a walk-through of their features
finding their hut
looking inside
pay with iron to tame, they will tell you when they’re tamed
taming one, doesn’t normally take that many tries to tame
following me
gave one a katana, increases the damage it does
right clicking to stand still
starting moving again
gave one a gold ingot, spawned a wolf (50% chance of working), also drops 3 bones when wolf is spawned
timer until another can be spawned, I fixed the chat message not having “Ninja:” in front of it
Other things not mentioned in the pictures:
give them a gauntlet and some shurikens and they’ll use those until they run out of shurikens
to check how many shurikens your ninja has, right click them with an iron ingot
Assassin Ninjas:
These guys have a kind of low spawn rate and little health, but they have one special thing. They are Invisible until they are close to you! And if you get to far from them they will disappear! Also they will be visible when they are not attacking anything (so you can see them in creative mode or from far away)
disappearing is broken!
example pictures –
– nothing
– Assassin Ninja!!
Boss Ninjas:
Boss Ninjas spawn in houses that look like this – 
NOTE: these will not spawn on previously generated worlds, you must make a new world or go to a not generated part of a world to spawn these
also DO NOT go on peaceful at any time if you want to battle these because they will de-spawn if you make it peacefulthey should be pretty uncommon
They are immune to fire
To start the boss ninja fight, right click him
first he will send a few guards at you
once you defeat those, right click him again and he will attack!
before you right click him twice, there is no point in hitting him as he will not lose any health
here is a video of the fight –
more details on them are in video description, including some small changes that were made
at the end of the video, the ninja boots are also shown
Drops a few ninja cloth scraps when killed
Guard Ninja
Boss Ninja spawns them to defend him, can be seen in the boss ninja fight video under the boss ninja section
Drops 1 ninja cloth scrap when killed
is also immune to fireWhen they die, all ninjas will vanish in a poof of smoke!
– thanks to nico2167 for this idea
Ninja Spawn Eggs
all the vanilla mobs can be spawned from eggs, and now so can all of the ninjas!
Achievements: The become a ninja achievement can now be earned by crafting a shuriken!