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As Sonic Underground was made during the time of 2D Sonic games, his age was probably around 9 as that was his age at the time within the games.

On Sonic wiki it says that he is 17 years old.

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Q: How old is sonic in sonic underground?
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Related questions

How old is sonic the hedghog in the sonic underground show?

Sonic is about 13 years old on Sonic Underground. On the Sonic Wiki it says Sonic is 17 years old.

What was the old anime of sonic with the green and pink hedgehogs?

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How old is manic in sonic underground?

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Can you watch Old Sonic cartoons anywhere?

You can often find them on, like "Sonic the hedgehog" and "Sonic Underground" or at a store called Hot Topic, they sell DVD's of the old Sonic shows.

Is there a sonic underground plush?

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Why is it that Sonic has two different lives Sonic Underground and the other one?

Sonic underground is a version of sonic in the underground dimension the other Sonic of Sonic X is from the Sonic X dimension check Sonic (disambiguation) Mobius encyclopeadia

What is the duration of Sonic Underground?

The duration of Sonic Underground is -1320.0 seconds.

Why did they cancel Sonic Underground?

They Cancelled Sonic Underground because the old characters where not popular anymore, And plus the new characters they made where more popular then the old ones. But I Know that Sonic Underground will be back again sometime this summer.

Where can you see the old sonic cartoon but not sonic x?

there are 3 sonic shows other than sonic x. they are adventures of sonic the hedgehog, sonic SatAM, and Sonic Underground. You can see episodes of these shows on

Who are sonic siblings?

Sonic does not have siblings in the main-canon, but in the old DIC cartoon, Sonic Underground, he has a brother named Manic and a sister named Sonia.

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What series was before sonic underground?

There were two Sonic shows before Underground: The Adventures of Sonic the Hedgehog (AoStH) and Sonic the Hedgehog (SatAM). SatAM was similar in setting to Underground. There was also a film, entitled Sonic the Hedgehog The Movie (Sonic OVA).