Official Canon:
* Shadow the Hedgehog (game): This game picks up directly after Sonic Adventure 2. Shadow, now aware of his past, is manipulated by the Black Arms, an alien race that wants to conquer Earth. He fights Sonic and his friends, but ultimately betrays the Black Arms and saves the world.
* Sonic Heroes (game): Shadow teams up with Rouge the Bat and Omega the Robot to form Team Dark. They join the fight against Eggman and his army of robots.
* Sonic the Hedgehog (2006): Shadow is involved in a time-traveling plot orchestrated by Eggman. He teams up with Sonic and Amy to defeat the villains.
Other Appearances:
* Shadow appears in various other Sonic games, comics, and animated series.
* While he doesn't have a consistent role, he often appears as a rival to Sonic or as a powerful force to be reckoned with.
* He is generally depicted as a more brooding and serious character compared to Sonic's cheerful nature.
In Summary:
* After Sonic Adventure 2, Shadow grapples with his identity and purpose.
* He goes on many adventures, often fighting alongside or against Sonic and his friends.
* He remains a popular character in the Sonic universe and his story continues to unfold in various media.
It's important to note that Sonic's timeline is complex and has been rebooted multiple times, meaning there are different interpretations of Shadow's story depending on which continuity you're looking at.