Where can you buy sonic costume age10-12 years?

any store. like walmart

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How do you make a silver the hedgehog costume?

you get to go to the store and buy the costume.

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Where can you find Sonic the Hedgehog costumes?

They are very hard to find. Your best bet is Ebay. or you can look on deviantart.com and look it up. See if someone could hand make it or or any halloween store.

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