"Rockin' the 'Bot": While out running, Sonic spies a frog in trouble! For rescuing it, the frog gives Sonic three magic stones: a green one for super strength, a yellow one for leaping great distances, and a red one for elasticity! Since Sonic doesn't believe the frog, he gives the stones to Tails. But when Doc Robotnik, in his new Beetlebot, attacks the Freedom Fighters while they're out testing an all-terrain vehicle! Can Sonic figure out the secret of the stone in time?

"Patient Zero." Having finally come face-to-face with Dr. Starline, Sonic needs to learn more about this new threat. He and Amy investigate an old Eggman lair but find it less abandoned than they thought when Rough & Tumble return for revenge!

Sonic battles his nemesis, Robotnik, as the villain traps him with plants, attacks him with a mechanical bomb-throwing monkey, and kidnaps Sally.

MISSING: Belle the Tinkerer—doll-like look, blue eyes, made of wood, usually wears a green hat, and is known for being clumsy. The search for Belle begins! Sonic and the Chaotix search far and wide for their new friend as she fights to escape. But will that be enough, or have the bad guys already won...? And where have the Zeti gone? Find out the conclusion to “Zeti Hunt”!

The ROAD TO #50 continues here! Enjoy a TEN-ISSUE long adventure leading up to the EPIC SHOWDOWN in milestone issue #50. A surge of imposters spells trouble for Sonic the Hedgehog, Miles “Tails” Prower, and even Dr. Eggman! Dr. Starline is pulling every tool from his kit as he creates his fastest and smartest inventions. An all new mini-series from Sonic writer Ian Flynn, Imposter Syndrome #1 will have readers seeing double!

Dr. Eggman's new capital city is expanding and only Sonic and his friends can stop it! On a recon mission with the new Diamond Cutters—Tangle, Whisper, and Lanolin—Sonic discovers that the Eggperial City is harnessing the resources around it to grow ever larger. The Diamond Cutters are still getting the hang of working together which leads to trouble when they get trapped. Alone against an army of badniks and a self-replicating city, Sonic calls for back-up and gets more than he bargained for: Tails, Amy, Blaze, and Silver all answer the call, but Shadow, Rouge, and Omega arrive for their own reasons too! While the Diamond Cutters have to have an emotional break-through to escape, Sonic and Tails coordinate a horde of heroes to try to bring the city down! Collects Sonic the Hedgehog issues #57–61.

Dr. Eggman's new capital city is expanding and only Sonic and his friends can stop it!