Nice try, Rocky!
This post includes plot details for Shadow Generations, Sonic Generations and Sonic Adventure 2
There is a part of Shadow Generations that I got unreasonably excited about, but it is going to take some explanation as to why.
There is a boss in Sonic Adventure 2 called Egg Golem. When you defeat it Sonic taunts it by saying “Nice try, rocky!” during the victory screen.
Also in Sonic Adventure 2, in a scene aboard the Space Colony ARK, Sonic the Hedgehog tries to fool Ivo “Eggman” Robotnik with a fake Chaos Emerald created by Miles “Tails” Prower, which Robotnik spots immediately.
These scenes don’t have much to do with each other, but in 2020 I watched videochess stream a Sonic Adventure 2 randomiser that not only randomises the levels and characters, but also all of the cutscenes, playing them in a random order and with every voice line for each character swapped with a random line of theirs from elsewhere in the game. The results are mostly nonsense but sometimes they line up in funny ways.
In particular a version of the fake Chaos Emerald cutscene plays where Robotnik says his line identifying the Chaos Emerald as fake early, to which Sonic responds by pulling out the emerald and saying “Nice try, rocky!”, apparently to the emerald itself. This resulted in several people watching, including myself, immediately declaring Rocky to be the name of the fake yellow Chaos Emerald. Eggman then tells Sonic to put Rocky down and back off.
Most of rest of the randomised dialogue is the usual ill-fitting nonsense, but the appropriate dialogue from Ivo with the Rocky line in the middle cemented this moment permanently in my mind. Rocky is my beautiful fake son and I want to protect him. And in Robotnik’s next line he insults Rocky and calls Rocky “sand” and says his machines hate Rocky and shoots my poor boy into space! It’s fucked up.
But Rocky does not have a large part in the Sonic series. The general idea of fake Chaos Emeralds gets revisited briefly in Sonic X where Sonic uses fake emeralds to turn into Dark Sonic and in the IDW comics Eggman tries to grow the “Eggperial City” using giant fake Chaos Emeralds. Also in the comics, specifically in Imposter Syndrome #2, a yellow gem that might be Rocky appears as a background detail on a shelf in Starline’s collection.
The real yellow Chaos Emerald appears throughout the series of course, including in Sonic Generations where it’s the emerald that you get for defeating Shadow the Hedgehog in a fight. And with Sonic Generations’ rerelease bundled with the new Shadow Generations campaign one of the many things that delighted me about the game is Rocky’s triumphant return and the silly way that it tied back into the original Sonic Generations.
In the promotional animated short for the game, Dark Beginnings, Shadow already has the yellow Chaos Emerald before the start of the game and holds on to it throughout the story. At the end of that short he flies to the Space Colony ARK and in an early cutscene in the game before being attacked by the Time Eater he finds Rocky still chilling on board the ARK and pockets it, now having both Rocky and the real yellow emerald.
Then, midway through the game, there’s a cutscene showing Sonic and Shadow’s fight from the Sonic Generations from Shadow’s perspective, where after losing he passes off Rocky to Sonic so that he can keep using the real emerald for his own fight.
It is, I admit, quite fan-wanky but I just admire pulling these disparate threads together and how this plotpoint is only possible because the fake emerald in Sonic Adventure 2 and the one in the Shadow rival battle in Sonic Generations both just happen to be the yellow one. And it means that Rocky is back! And he did such a good job! And he even retroactively gets to appear in Sonic Generations now too!