The Naruto: Clash of Ninja series provides examples of:
Adam Smith Hates Your Guts: There's a lot of ridiculous prices for characters in Revolution 3. Then again, it's Bando running the shop.
Assist Character: Choji helps Ino out during her special move in 2. When Choji was made playable in 3, the move was changed so Asuma would be the assistant instead (this change was also made in Revolution, despite Choji not being part of that game's roster). In Revolution 2, where both Choji and Asuma are playable, Ino received a new attack that wouldn't need any assist characters.
Barefisted Monk: Any character who doesn't have long range abilities falls under this. Examples include Lee, Guy, Tsunade, and Neji's Shippuden version.
Battle Aura: Used by some characters, particularly Naruto, as a power-up visual.
The Beastmaster: Kiba can order his dog Akamaru to attack for him in battles. Kankuro and Chiyo can use their puppets in a similar style.
Shikamaru's thinking stance can lead into a variety of different attacks or counterattacks, making his fighting style difficult to predict.
In Clash of Ninja Revolution 3, Kakashi can fall under this. Every time he uses a special, he can choose one of five jutsu, but since all of them have the same start-up animation it's hard to guess what he'll do.
Double Unlock: Revolution 3's store would often show the characters that needed to be unlocked when you bought all the required characters... But they'd be unselectable anyway due to not showing their names or prices until you complete more tasks.
Dual Wielding: In Revolution 3, Hidan uses his scythe and pike simultaneously.
Dueling Games: This series and the Ultimate Ninja series, respectively.
Dummied Out: Naruto: Clash of Ninja Revolution has several unused sounds in its Sound Test. For example, there are sounds that imply that Lee originally went beyond two gates, Kisame calling out his Shark Skin, and another that implies that Gaara was intended to go Shukaku. The developers say that they left them in as Easter Eggs for the fans to discover. At least one, Itachi's "Mangekyo Sharingan!" was used in Clash of Ninja Revolution 2.
Flash Step: Used by some characters to teleport behind the opponent for a sneak attack.
Choji. He has very powerful combos, but when he gets caught in somebody else's combo, he has a hard time escaping.
Rock Lee can be made into one if he actives the Gate of Life, which supercharges him but drops his HP to 1.
Heads I Win, Tails You Lose: The story modes often have the player character fight the same battles as the anime. You're expected to win even in matches where, in the canon, your character got curb-stomped; once you win, the story mode continues as if you had lost.
Moveset Clone: Iruka and Mizuki. Their movesets are almost identical, the only difference being that Mizuki makes greater use of the Fuuma Shuriken. later games added Zabuza and Kisame, Kimimaro and Kagura, Haku and Komachi, and a few more.
Nonchalant Dodge: Shikamaru casually leans away from attacks without taking his hands out of his pockets.
Deidara, in Revolution 3. A blatant cheater, and you are forced to play as Nine-Tails Naruto, a close combat fighter who can't do damage unless he's right next to the enemy. Of course, since Deidara doesn't stagger unless knocked off his feet, that gives him plenty of time to throw up another damn storm of clay bombs that break your guard. Even if you do knock him off his feet, he'll use Ninja Log to get out of range, leaving a bomb behind to knock you into yet another combo of bombs, when he's not using Teleport Spam to blast you again. Did we mention it's a Timed Mission with only a minute on the clock, and you can only win if you use a Special as a finisher?
The series makes regular use of this trope for its final battles, usually in the form of Super Armor. Here they are in order by game: 1: None; 2: Gaara (The one consolation was that, in this game, you could get an item that gave your character Super Armor, something no other game has done since.); Gekitou Ninja Taisen 3: Unknown; Gekitou Ninja Taisen 4: None, the final boss (Naruto/Sasuke, you get to pick) isn't superpowered; Revolution: Itachi Uchiha seems to be the only one ; Revolution 2: Might Guy, Kagura, AND Kabuto (Kabuto doesn't have Super Armor, but he regenerates. Guy, however, is the worst of the three, as not only does he have the Super Armor, he also takes little to no damage from attacks, AND you have to defeat him with the Primary Lotus. Also note that the former two aren't final battles, but Kagura can be semi-excused for being rather climactic.); Revolution 3: The aforementioned Deidara is another absurd example as you fight against him earlier, and he doesn't have the Super Armor. Gekitou Ninja Taisen EX series: Unknown
S Rank Missions In Clash of Ninja Revolution 3. You face your rival who doesn't stagger and has increased damage. This isn't so bad for some characters, but when you're fighting say Itachi Uchiha who's already high tier, just put the controller down.