Split Kit and Skylar are wearing Sonic underwear
Elias Acorn v1 Keychain SONIC – Mitgard Store
Sonic The Hedgehog Boys' Big Multipacks Different Prints and Pack, 4, 6, 8, 10, and 12, 7-Pack Athletic Boxer Brief: Clothing, Shoes & Jewelry
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Sonic The Hedgehog Underwear & Socks for Baby & Kids - JCPenney
Sonic the Hedgehog Boys' Underwear Multipacks - Size 10
Sonic The Hedgehog Boys' Big Multipacks Different
Sonic The Hedgehog Underwear & Socks for Baby & Kids - JCPenney
Sonic The Hedgehog Underwear & Socks for Baby & Kids - JCPenney
Boys' Sonic The Hedgehog 5pk Underwear : Target