The Fairly OddParents (2001)

S5E33 Timmy The Barbarian

Binky isn’t feeling well, so Jorgen arrives with a comforting bowl of soup and a bedtime tale to cheer him up. The story he shares is "Timmy the Barbarian," and as Jorgen narrates it to Binky, the characters—Timmy, Cosmo, and Wanda—find themselves immersed in the adventure for real!