TMNT 2003 S1: Four Turtles More

Fifteen years have passed since the accident. Now, eight turtles, six brothers and two sisters, born as mutants in the sewers and trained as ninjas by a rat, are forced to leave their destroyed underground home and take the first step into a surface world where they face many adventures and meet new friends and foes, until they meet their toughest opponent ever, The Shredder.