when is the release date of the sequel of the series in which the title character is the sonic the hedgehog?
Sonic &amp; Knuckles:  Released on October 18, 1994, it is an installment in the main "Sonic the Hedgehog" series and a direct sequel to "Sonic the Hedgehog 3", which released earlier that year. Sonic the Hedgehog (character): Sonic the Hedgehog (Japanese: ソニック・ザ・ヘッジホッグ , Hepburn: Sonikku za Hejjihoggu ) is the title character and protagonist of the "Sonic the Hedgehog" series released by Sega, as well as numerous spin-off comics, five animated shows, and an animated OVA.
i don't know