Sabu's biggest enemy is Raka, who is of the same size as that of Sabu, and is immortal, thanks to a special Ayurvedic medicine he accidentally consumed.
A secret that many of the characters in the comics do not know is that Chacha Chaudhary has a twin brother named Chhajju Chaudhary, who is not as gifted as Chacha Chaudhary.