Tommy, along with his sister Tammy, live miserable lives due to their constantly busy father and mother who is never around, and their evil babysitter robot, who usually tortures them with many weapons. Luckily, like their father, they also have Cosmo and Wanda as their fairy godparents to make them happy and grant them wishes.
He wears pink clothing and a pink hat, similar to what his father once wore as a kid, although Tommy's hat is a different design which slightly resembles a crown. Other than the color of his hair, which is black, and his nose, which is pointy instead of round, Tommy is almost completely physically identical to the ten year old Timmy. He also has buck teeth, getting them possibly the same way Timmy did.
Not much else is known about him, as he has no speaking lines (by himself) and is only seen briefly at the end of Channel Chasers, digging up a time capsule with his sister that his father buried twenty years ago. When he learned that he was going to be babysat by robot Vicky, he tried to cling to his father's legs while pleading him not to leave, but Timmy shook him off and said goodbye to him and his sister, which is when their names were heard. Luckily, like their father once did, they also have fairy godparents to make them happy and grant them wishes. Ironically, their fairy godparents may be none other than Cosmo and Wanda.
When Timmy's children were first shown, it was unknown who their mother was, and this was intended by the creators who gave Tammy and Tommy features of Timmy and both of his love interests, Tootie and Trixie Tang (the latter of whom did not appear in Channel Chasers). After the release of "Grow Up, Timmy Turner!" however, it is heavily implied that Timmy falls in love with Tootie in adulthood, although it is still unknown who is Timmy's wife. Likewise, the official Nickelodeon website for the FOP movie contains a quiz which indicates that Tootie would name her first child "Tammy" or "Tommy".
The name "Tommy" has also been used by several characters to mistakenly call Timmy. It was also the name of his wished-for older brother. Both Tommy and Tammy have names similar to Timmy to keep the mother's identity further hidden.