Sonic and Tails are chasing Eggman who has a classic animal capsule that Sonic and Tails are trying to rescue. Eggman lets the capsule fall that Sonic misses and Eggman shoots their plane down which forces them to land on a floating hexagonal planet that Tails says is called the Lost Hex. They land their and it is revealed that Eggman is working with six inhabitants of the planet called Zazz, Zomom, Zik, Zeena, Zor, and the leader Zavok or the Deadly Six that he mastered by using the magic conch to render them powerless. After zone 2 the Deadly Six betray Eggman when Sonic kicks the conch out of Eggman's hands because he thinks it is bad and this causes them to temporarily team up. The Deadly Six use Eggman's machine to suck all of the Earth's energy and Amy and Knuckles are dead because of this. At zone 5 Tails is kidnapped and is going to be turned into a robot. At zone 7 Eggman sacrifices himself to save Sonic when Zazz and Zomom destroy the bridge over lava that Sonic and Eggman are on. It turns out Tails reprogrammed the machine to not turn him into a robot and Sonic takes out the rest of the Deadly Six. Eggman also survived his fall and has a new battle mech to fight Sonic, but he easily defeats it. Sonic and Tails destroy the planet sucking machine and land back on Earth where Amy and Knuckles are still alive, Sonic takes a nap, and half of Eggman's mustache is burned off.
-The graphics look very nice and cartoonish.
-Sonic controls very well in 3D sections.
-The music is great.
-It has funny dialogue (specifically from Eggman and the Deadly Six)
-Eggman is very serious and threatening in this game.
-Mike Pollock is amazing as Eggman.
-Most levels are designed very well and are memorable.
-The story is simple and pretty decent.
-The spin dash is helpful.
-The story doesn't explain a lot.
-The 2D sections are pretty bad.
-The parkour goes off when you don't want it to.
-The Deadly Six are very bland and one dimensional.
-Sonic's voice is a little annoying in this game.
-Some levels make you want to break your wii u.
-The red rings will make you want to strangle a cat.
-Some level gimmicks are very bad and shouldn't have been in the game.
-Color powers are bad and are thankfully usually optional.
Overall this game has given me mixed feelings as a Sonic fan, but I think it deserves its praise more than it deserves its hate and I think that if you are a sonic fan with a wii u than buy it. If you have a wii u and you want to expand your collection then you should play the demo first or rent it