User blog comment:Spanishechidna/Sonic Generations Console Zones/Stages/@comment-17720060-20110609151152/@comment-17720060-20110609153520

That's true, too. But it would still be weird for two Sonics to re-visit stages that would've got erased in time after the events of '06. Nevertheless, some stages were the SHIZ-NIT in that game, but the only stage they shouldn't add to Generations that was in 06 is Wave Ocean. It's too similar to Emerald Coast and Coast is more Classic than Wave Ocean.