Fart-A-Tart

Fart-a-Tart is a deodorant brand that only appears in "The Sickening Fumes of Smartsy Fartsy". As its name implies, the spray has a strawberry tart scent. Harold often uses it to cover the stench of George's farts.

The Epic Tales of Captain Underpants
While discussing activities he and Harold could do to distract them from pranking, George abruptly farts. Nauseated by the smell, Harold sprays Fart-a-Tart on George.

Later, when Smartsy Fartsy traps the school in a "Fartosphere", George and Harold decide to spray it on Captain Underpants' face. The sweet fragrance allows him to escape the Fartosphere and defeat Smartsy Fartsy by blowing him away with a helicopter rotor.

Commercial Transcript
[George and Harold] Fart-A-Tart!

[Harold] The everyday spray that makes George's farts smell like tarts!

[George farts while Harold sprays him with Fart-a-Tart]

[George] Mmm! Tart-Tastic!