The Little Traitor Dudes For Children's Defense, or LTDFCD were the counterparts of the Delightful Children from Down the Lane.
After Negative Numbuh 4 was defeated and taken away, the LTDFCD were glad in returning to the reformed DNK.
Their initials are "DCFDTL" backwards.
Later, they joined in the fight against Negative Numbuh 4 and his evil DNK Attack Team, where they would have lost if Negative Numbuh 86 had not interfered. After Negative Numbuh 4 was defeated, the LTDFCD and DNK operatives agreed to become friends.