|Family||Wallabee Beetles, Sydney Beatles, Mrs. Beatles|
|Friends||His brother, Safety Bot (formerly)|
|Enemies||Dodgeball Wizard, Safety Bot|
|Voiced by||Dee Bradley Baker|
Joseph "Joey" Beatles is the baby brother of Numbuh 4. He is also a dodgeball prodigy and the best dodgeball player in existence.
Joey made his first appearance in Operation: S.P.R.O.U.T., where he was crying after hearing his dad's boring story at the dinner table.
Joey is a main character in Operation: D.O.D.G.E.B.A.L.L. in which the villain, The Dodgeball Wizard, triumphs over Wallabee (whom he mistakes for the world's greatest dodgeball player only knowing that the greatest dodgeball player is "the one called Beatles") in a game of dodgeball.
Only to discover that the greatest dodgeball player in the world is actually Joey, The Wizard engages Joey in a spectacular game of dodgeball throughout the city, which baby Joey ultimately wins. Joey is probably a bit less than 1 year old or as he appears.
Joey is the best dodgeball player in the world, and was great enough to withstand Dodgeball Wizard's fearsome attacks and defeat him. Even at one year old, Joey shows to be very agile.
- His name "Joey" probably comes from the Australian slang word "joey", which means baby marsupial (Kangaroo, Wallaby, Koala, Quokka, Possum, etc.), making him and Wallabee named after Australian marsupials.