Greninja using Mat Block before his Final Smash

Secret Ninja Attack (しのびのひおうぎ Shinobi no Hi Ougi?, lit. "Shinobi's Secret Finishing Technique) is Greninja's Final Smash.


Greninja will put a mat underneath the opponents in front of it and smack it like a lever, sending the opponents into the air as the screen darkens and a moon appears. There, a silhouette of Greninja will fly around rapidly dealing quick strikes before dealing a final blow. The screen will focus on Greninja floating in the air for the next few seconds, leaving the target to be KO'd offscreen.

In Super Smash Bros. Ultimate, Greninja's Final Smash returns, but the only difference is that Greninja transforms into Ash-Greninja before performing said Final Smash.


Greninja activates this move by striking downward at a tatami, a type of mat, to flip it upward and hit opponents, referencing Mat Block (known in Japan as Tatami Flip), formerly one of its signature moves in the Pokémon games. Mat Block possesses the ability to defend the user's side of the field from all attacks used after it; however, unlike other protective moves, it does not possess increased priority and thus will fail if used last in the turn. It is also only able to be used the first turn after Greninja enters the field; at all other times, it will fail. While not named after it, the move's overall aesthetics may have drawn inspiration from Night Slash, a move Greninja can learn by leveling up in the games.

Ash-Greninja is a form Ash's Greninja obtained by being synchronised with its trainer. It is similar to the Mega Evolution ability used for 2 final smashes), even said to be equal in power. This transformation caused Greninja to temporarily take on a design based on Ash and his Kalos outfit, as well as producing a psychic bond with Ash. The transformation later appeared in the main series games with a special Greninja (Ash’s) only obtainable in the Sun and Moon demo, where the transformation would activate upon defeating an opponent.


  • This Final Smash was initially erroneously referred to as "Night Slash". However, Greninja's Final Smash appears to have elements of both Night Slash and Mat Block in it.
  • Greninja's trapping mat that the Pokémon uses to trap his opponents is actually one of his former signature moves; called Mat Block from Pokémon X and Y.
  • The Final Smash is similar to Spider-Man's Hyper Combo in Marvel vs Capcom 3 called Maximum Spider, D1 also said the name when a Greninja player used the Final Smash against two players in the Super Smash Bros. Invitational tournament.
  • In stages with platforms that reside at high altitudes, such as Palutena's Temple, characters not caught in the Final Smash are able to show up in the animation. These characters are fully mobile and do not appear as silhouettes, unlike Greninja and any opponents it caught.
  • Although the trophy depicts a full moon, the final smash actually only uses a graphic of half of the moon, which can be seen by pausing and moving the camera (Wii U only). In the 3DS, more of the moon is visible when the camera is focused on Greninja, but one can't see where the moon ends in normal gameplay.

Greninja's Special Moves
SSBWU/3DS Ultimate
Standard Special Water Shuriken
Side Special Shadow Sneak
Up Special Hydro Pump
Down Special Substitute
Final Smash Secret Ninja Attack