Characters of each season:
-Season one and two turtles and allies:
Hamato Leonardo
Hamato Raphael
Hamato Donatello
Hamato Michelangelo
Hamato Splinter
April O'Neil Stockman
Cassandra "Casey" Jones
Elizabeth O'Neil
Shadow Jones
-Season one and two Foot and allies:
Oroku Saki "The Shredder"
Arnold "Attila the Hun" Jones
Baxter Stockman
Oroku Tang Shen
Oroku Karai
Oroku Jennika
Slash
Thrash
Lash
Crash
-Season three and four Turtles and allies:
Hamato Leonardo
Hamato Raphael
Hamato Donatello
Hamato Michelangelo
Hamato Jennika
Hamato Splinter
April O'Neil Stockman
Cassandra "Casey" Jones
Leatherhead
Pigeon Pete
Hokum Hare
Alopex
Tang Shen
Elizabeth O'Neil
Shadow Jones
Murakami Tatsu
Keno Santos
Irma Kurtzman
Jack Kurtzman
Sid Jones
Angel Jones
Murakami Tatsu
Renet the Timestress
-Season three and four Foot and allies:
Oroku Karai The Shredder
Tigerclaw
Rahzar
Koya
Bludgeon
Stockman Brain
-Season three and four Purple dragons:
Arnold "Attila the Hun" Jones
Slash
Thrash
Lash
Crash
Bebop
Rocksteady
Anchovy
Fish face
Spiderbite
Snakeweed
-Season five turtles and allies
Hamato Leonardo
Hamato Raphael
Hamato Donatello
Hamato Michelangelo
Hamato Jennika
Hamato Splinter
April O'Neil Stockman
Cassandra "Casey" Jones
Leatherhead
Pigeon Pete
Hokum Hare
Alopex
Tang Shen
Elizabeth O'Neil
Shadow Jones
Murakami Tatsu
Keno Santos
Irma Kurtzman
Jack Kurtzman
Sid Jones
Angel Jones
Murakami Tatsu
Renet the Timestress
Mortu/Jordan Perry
The Fugitoid
Traximus and his Triceratons
Arnold "Attila the Hun" Jones
Slash
Thrash
Lash
Crash
Bebop
Rocksteady
Anchovy
Fish face
Spiderbite
Snakeweed
-Season Five Kraang and allies
Chr'ell
Mutagen Man
Newtralizer
Koya
Rahzar
Stockman Brain
Super Shredder Karai
-Season Six turtles and allies:
Hamato Leonardo
Hamato Raphael
Hamato Donatello
Hamato Michelangelo
Hamato Jennika
Hamato Splinter
April O'Neil Stockman
Cassandra "Casey" Jones
Leatherhead
Pigeon Pete
Hokum Hare
Alopex
Tang Shen
Elizabeth O'Neil
Shadow Jones
Murakami Tatsu
Keno Santos
Irma Kurtzman
Jack Kurtzman
Sid Jones
Angel Jones
Murakami Tatsu
Renet the Timestress
Mortu/Jordan Perry
The Fugitoid
Traximus and his Triceratons
-Season Six Mighty mutanimals:
Mutant town Mayor Arnold Jones
Tigerclaw
Bludgeon
Slash
Thrash
Lash
Crash
Bebop
Rocksteady
Anchovy
-Season Six Members of Mutant town:
Lita
Mona Lisa
sheena
Splinter Dojo Students
Herman the hermit crab
Old Hob
Many others
-Season Six enemies:
The Rat King
The Punk Frog gang
Don Silverback and his great ape society
Hypnopotomus
Repomantis
Meat sweats
Silverfish hoard
Fishface
Spiderbites
Snakeweed
-The Battle Nexus chronicles Characters:
Hamato Leonardo
Hamato Raphael
Hamato Donatello
Hamato Michelangelo
Hamato Jennika
Hamato Splinter
April O'Neil Stockman
Cassandra "Casey" Jones
Alopex
The Daimyo
Big Momma
Ue the ultimate ninja
Kavaxas
Drako
Lord Draxum
Miyamoto Usagi
Gen the Rhino