A Rush of Ninja Wisdom! (Japanese: ケロマツ対ゲコガシラ！忍者バトル！！ Froakie VS Frogadier! Ninja Battle!!) is the 17th episode of Pokémon the Series: XY.
Ash and his friends meet up with Ninja Trainer Sanpei who owns a Frogadier. Ash challenges Sanpei to a series of ninja-training exercises, as Froakie learns a new move.
Ash trains Froakie, who uses Water Pulse and Bubble on the rocks. A voice tells them they still need a lot to train. Froakie notices something and uses Water Pulse on a tree. It is actually covered by paper, behind which a boy is located and commends them for noticing him. The heroes are surprised, for that is a ninja, who vanishes. Froakie releases frubble onto some leaves. Ash and Froakie head there, but see a Pokémon, Frogadier. Froakie's evolved form. Frogadier, as well as its master, the ninja boy, leap through the trees. The ninja is Sanpei, while Ash, seeing Frogadier's skills, challenges Sanpei to a battle. Sanpei thinks Froakie lacks strength, angering Ash, who replies he does not know Froakie's battling strength. Sanpei sees he may be right, so accepts the battle.
Froakie starts with Bubble, though Frogadier evades and leaps on a tree. Froakie jumps to pound Frogadier, who dodges. Froakie repeats the attacks, but misses every time. He uses Water Pulse, but Frogadier vanishes using Smokescreen. Froakie remains calm and senses Frogadier, then uses Water Pulse. However, that was a decoy log with frubble, for Frogadier comes out of the water and uses Bubble. Froakie uses Bubble to counter, but gets hit, including the Water Pulse attack. Froakie uses Water Pulse, but Frogadier dodges the attack and leaps around Froakie using Quick Attack and attacks Froakie before he could dodge. Froakie is hit, but stands up, still wanting to fight. Frogadier uses Quick Attack, but Sanpei feels something wrong about Froakie and conceals him. Sanpei tells the battle is over, while Ash is not pleased they lost.
Later, Ash has Froakie drink some water, thinking it is his own fault for not developing a good strategy. Sanpei comes and tells he is correct: they are lack training. Ash is frustrated about this, but Sanpei gives Ash a pill made from Energy Roots. Froakie swallows that and is outraged, for it tastes bitter. Sanpei laughs, for it did work. He leaves, but Ash stops him, wanting to know Sanpei's tactics. Sanpei decides to teach Ash, but lets him know first he has to train well and strict. Ash is still up for the idea, while Bonnie asks to become a ninja. Serena opens her kit and soon has Pikachu, Dedenne and Bonnie dressed as ninjas. While the "ninjas" train, Sanpei lets Ash know Froakie has to have its muscles as springs to learn Quick Attack.
Clemont's eyeglasses shine, as he introduces the newest invention. Basically, one has to wear the shoes with springs, which allow double the height to be jumped away. Clemont takes a step to show how it is done, but, by accident, he jumps so high he blasts off. At any rate, Sanpei shows a course of rocks and trees, which Frogadier jumps and leaps on. Froakie manages to do the same, while Sanpei, Ash, Bonnie and Pikachu also exercise. Sanpei and Frogadier speed up, as do Pikachu, Ash and Bonnie, though that makes the latter dizzy. Ash and Sanpei continue, while Froakie managed to become much faster. The next course is walking on water. Clemont replies that is almost impossible, by science. However, Frogadier demonstrates it actually can walk on water.
Froakie attempts to do it, but sinks in, while Frogadier laughs. Ash tries to do that, but sinks as well. Sanpei tells that is impossible, even for him, while Froakie could do that if he repeats rotating the legs. Froakie bounces a bit and tries again, but fails. Froakie tries to do this several times, but fails. Frogadier demonstrates again, making Froakie frustrated. By Ash's advice, Froakie channels the frustration into the course and succeeds in walking on water. Frogadier is not amused, making Froakie even angrier. Team Rocket observes this and plans on catching Frogadier. Ash asks for next course, but he and Sanpei are hungry. Clemont, Serena and Bonnie prepare lunch and everyone eats. Sanpei enjoys the food, seeing it comes from the tales of his village.
Everyone goes for a nap. Ash wonders about Sanpei's village, while Sanpei replies there his eldest brother, Ippei, lives, with Greninja, as well as the other brother, Nihei, with Venusaur. Sanpei has a dream about defeating his brothers and be the best trainer of the village. Ash replies he wants to be a Pokémon Master, while Serena thinks despite their different goals, they make good rivals. After the nap, the next course is leaping the trees. Sanpei and Frogadier leap and Sanpei tells Ash he needs to predict on which branch he should leap. Ash and Froakie manage to go well through the course, but they accidentally leap beyond the final tree on the end of the cliff. Sanpei throws the rope and binds Ash, warning him he should be aware of his surroundings when leaping.
The final course is to use Quick Attack to smash boulders. Frogadier displays, through speed, to smash the rock. Froakie increases his speed to smash the rock, but fails. Froakie repeats again and speeds up and tries to predict the next move, but the rock remains untouched. Frogadier tries to demonstrate, but it and Froakie dodge an attack, for Team Rocket appears in their machine. Team Rocket's machine flashes out, so Froakie and Frogadier barely dodge their attack. Frogadier releases the frubble, causing the flashlight to be covered and cannot flash out. Sanpei advises Ash to combine forces to defeat Team Rocket. The machine attacks, though Froakie and Frogadier use Quick Attack to dodge. Froakie lags behind, while Frogadier attacks the machine. The machine releases the net, catching Frogadier and Pikachu, though the latter tried to use Iron Tail.
Team Rocket attacks Froakie, who increases his speed. Remembering the training courses, Froakie creates illusions, using Double Team. Team Rocket does not know which Froakie is the real, allowing Froakie to use Water Pulse. Frogadier and Pikachu are freed, the latter uses Thunderbolt. Using Water Pulse, Froakie and Frogadier blast Team Rocket off. Later, Sanpei and Frogadier thank Ash and Froakie for the intervention. Ash thanks them, for their help, Froakie learned Double Team. Serena, Clemont and Bonnie think Double Team will help in Ash's future battles. Ash asks Sanpei for more battles the next times he meets him. Sanpei promises that and bids the heroes farewell. Froakie also bids farewell to Frogadier, then runs off to Ash.
- "Who's That Pokémon?": Frogadier (US)
- "Pokémon Quiz": Frogadier (JP)
- When Froakie is dashing to hit the boulder once again, its hands are completely colored blue instead of white.
- The Vs. screen that appears before Ash and Sanpei's battle depicts Pikachu instead of Froakie.
- When Sanpei explains the final course, Ash's hat is discolored.
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