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Jack Turtleson ()
The tortoise Jack/Tad is probably Ollie's best friend, as he's seen mostly hanging out with him in each episode. However, in every mess that he and Ollie/Boes get into, you can bet that his shell will break apart at least once. In the original Dutch comics and animation, along with the Italian version he is a female turtle. *In original Dutch comics, the female turtle is called Dolly.
Voice Actors
Hirotaka Suzuoki
Japanese
Gérard Hernandez
French