The Ninja Suit is worn by the Norrisville Ninja who defends his hometown from dangerous threats on a frequent basis. It wields extreme power and bestows its current wearer with extraordinary, above-average abilities. Every four years, it's passed down to a new wearer, a freshman in high school. The only two other known wearers besides Randy Cunningham are the First Ninja and Mac Antfee, the latter expelled from being the Ninja after six years due to his rash, crazy attitude.
The Ninja Suit can be used by people other than the chosen Ninja, so when Randy mind-wipes himself on accident, Howard wears the Ninja Suit in "The Ninja Supremacy." Yet, the suit deactivates if the current owner fails to use its powers the right away, so the suit is temporarily disabled to Randy in "Swampy Seconds."
CapabilitiesArt of Healing, Ninja Rage, Earth Attack, Hydro Hand, and Air Fist. The suit also can bring out objects out from the suit or use the object even without bringing it up. The NinjaNomicon holds the secrets to unraveling the suit's true potential.
The suit can also control an ancient bird demon known as the Tengu.
Ninja Chain Sickle: A long chain with a sickle at the end. Randy often uses this weapon to kill multiple opponents at once or to use it against large enemies to hit them from afar. This is the second weapon Randy uses in the Title Sequence.
Ninja Eskrima: Twin-shaped weapon that used to block and counter attacks.
Ninja Kamas: Twin, mini-scythes that are used to throw against the enemy.
Ninja Manrikigusari: Twin-shaped weapon with a long chain.
Ninja Nunchucks: Twin-shaped weapon that is used for attacking long or short distances.
Ninja Ring: A disk-shaped weapon that is used as a shuriken.
Ninja Sai: A dagger-shaped weapon with two cured prongs helps to block, stab, and pin the enemies.
Ninja Scarf: The Ninja Scarf is similar to a grappling hook which the Ninja can use to swing from one place to another place, or to grab his opponent.
Ninja Spikes: A retractable weapon that can be used for punching, kicking, climbing, and sneaking.
Ninja Sword: A sword that the Ninja can use. The sword can also be dual used, using two swords at once. This is Randy's most used and, according to S. Ward Smith, the Ninja's swordsmith, his most powerful weapon if used properly. This is the first weapon that Randy uses in the title sequence.
Ninja Ukulele: It is revealed in "Ninjafan", and he seems to keep a Ukulele inside his suit.
Smoke-Bomb: A useful bomb for the Ninja to appear and disappear with. Once in a while, the Ninja will have to restock them using the Skunk Pine.
- The scarf and accents on the suit were originally going to be orange, as seen in concept designs and images, but they were changed to red.
- The design of the suit changes depending on the wearer, as the First Ninja, Mac Antfee, and Randy don't have the same design.
- The Ninja suit can be torn, as seen in "The Ninja Identity".