History Characters / TeenageMutantNinjaTurtles2003TurtlesAndSplinter

* OffhandBackhand: When the Shredder and the Foot Ninja attack April's antique shop, Master Splinter smacked a Foot Soldier with his stick without even turning back. He does this again to another Foot ninja when Karai invades the Lair and maybe once more at one point in between.

* CharacterCatchphrase: "I got your X right here." and also "You and me are having words." And whenever he is having a bad day he tends to say "The old turtle luck running true to form." In the ''Fast Forward'' season, he often said "I hate the Future!"

-->''[Leo gets beaten up by some Foot tech Ninjas]''\\

* CharacterCatchphrase: "I got your X right here." and also "You and me are having words." And whenever he is having a bad day he tends to say "The old turtle luck running true to form."

* AloofBigBrother: Partially inverted. He's younger than Leonardo making him an aloof little brother, but older than Donatello and Michelangelo, playing it straight for them, as he has a harsher personality and lone wolf mentality whenever he is feeling pressured.

* BigBrotherInstinct: While typically considered the younger of the two, when a beaten and battered Leo is tossed through the window, Raph's first instinct is to go hunt down who did this to his brother. Played straight for Donnie and Mikey. When Donnie is kidnapped by the last surviving Y'lintian, Raph is the first to go after him and threatens to level all of Y'lintus (an underground city that inspired the myth Atlantis) just to get him back. In ''Fast Forward'', the Turtles and Splinter time travel to the year 2105. In the first episode, Mikey becomes separated from his family while the others are rescued by a robot named Serling. Raph threatens to turn him into scrap metal if he doesn't help him find Mikey. Leo and Don even have to hold Raph back from attacking Serling. He also displays this to Cody, April and Casey's great-grandson.

* BigLittleBrother: While never officially stated, Leo is usually the oldest among the four. Raph, however, is the tallest in the final two seasons, much like the [[Film/TeenageMutantNinjaTurtles1990 1990 film]].

The brains of the bunch. Donnie is still the smartest turtle, like the other versions, and is more pacifistic compared to his brothers. Due to this and his preoccupation with tech, he is the weakest fighter, but his inventions and ideas make him an invaluable part of the team. He gets easily excited over new technology or fascinating creatures, causing him to be distracted even during bad situations. Despite seeing things such as time travel, other dimensions, and aliens, he still maintains a scientific view of the world and disbelieves any wild fantasies not seen in person. He fights with a bo staff.

* BadassPacifist: Overlapping with MaritalBadass, he would prefer not to use his weapons and fists to solve a problem. Emphasis on ''prefer''.

* BigLittleBrother: In the final two seasons, he is taller than Leo, but just barely shorter than Raph, despite being younger than the two.

* AdaptationalPersonalityChange: [[DownplayedTrope Downplayed]]. In the original Mirage comics, he was HotBlooded like Raph. In the ''Turtles in Space'' arc, he actively antagonized the Triceratons, pointing out that since the Prime Leader told them he needed the Turtles alive, they can't technically retaliate. Here, he is more of a CowardlyLion and his scenes of antagonizing the Triceraton captors are given to Raph instead. This is downplayed because when [[Recap/TeenageMutantNinjaTurtles2003S6E14TheGaminator he and his brothers are trapped in a video game, where any wrong move might mean death]], Mike is [[BloodKnight clearly is enjoying the situation far more than his brothers are]].