Having meeting up with his future counterpart, and Sonic's future counterpart, they discovered they're in space in time, since the Time Eater abducted the rest of their friends.

Sonic Chaos Sonic Spinball Sonic Generations When the get there, the character (that they’re not playing as) flies the plane, helping the character get to the Death Egg. Sonic/Tails escapes and goes to the end of Wing Fortress. Make sure you PASS the chaos Emrald then GO to challenge mode AND get That little gold key in the stage, Where it shows the CHAOS EMRALD But MAKE sure not to get hit. Make sure not to let anyone to play With you then go TO stage 3 in 2P Mode. On the Tornado, Tails (or Sonic if you’re playing as Tails) carries Sonic (or Tails if you’re playing as said character) to the Wing Fortress Zone and the plane gets shot down. First get speacal STAGE MODE in 2 play mode then pick Team sonic in 2P Mode. When him and Sonic found out that Eggman was building the Death Egg, Sonic and Tails team up.

Lets play sonic heroes part 7