From then on, he makes short appearances in flashbacks.
After that, Shadow lost consciousness in space, and is presumed dead by everyone. He then helped Sonic prevent the Space Colony ARK from crashing into Earth by taking off (and losing) his Limiters for a massive Chaos Control. The epiphany in Episode 38 led him to join with Sonic to defeat the Final Lizard. Christopher Thorndyke reminded Shadow of his true promise to Maria, instead of Amy Rose. He appeared in the Sonic Adventure 2 adaptation through Episodes 33 to 38, although there were a few differences, such as in Episode 38, Shadow teleported Christopher Thorndyke and Rouge the Bat to Space Colony Ark (instead of just Rouge).
Super Shadow and Super Sonic stopping Space Colony ARK