User blog comment:Rainbowroad6w/Interesting Sonic Generations photo/@comment-4988786-20111013015300

I used a translator and came up with this: Tails: Poisonous sky press Y to Tails' hand and take to reach the goal before time runs out.

I guess it means that you have to have Tails carry you across "Poisonous Sky" (which may be some kind of upper level of Chemical Plant) and reach the goal before the time runs out. Bet it's a challenge mission.