SEGASonic aside, if the Tails spin-offs can be deemed as post-S3K, they could happen during Chaotix & 3D time. Each of the relevant characters at the time would have an exclusive adventure, with 2 of them involving Eggman. Are there any indications that the Tails spin-offs synopsis should be seen as happening before Tails met Sonic? EDIT: OK, the very synopsis of Tails Adventure state it happened before Sonic2. Still, there comes the discrepancies again. Tails is native to Westside Island, AFAIK. Why would he move to Cocoa Island and later return to Westside Island, where he was bullied? And...wait a second... Tails Skypatrol is AFTER he met Sonic. The synopsis states it.