Grinder is training, and decides to try a new combo. But, after using the Flame Of Glacieo 3 times in a row, Grinder has a split second vision about a demonic being. Grinder wonders what is going on, and decides to go to the repaired libary to find a book. However, Ripper wants him to return some Transformers books for him. Grinder goes off. During the first stage, Grinder wears his usual clothes, but later on, gets new ones...
For the first three stages, it plays like a normal Sonic/Grinder game. However, in the fourth stage, when Grinder gets new shoes and gloves, he can fire bend, which is why his gloves have a picture of some fire on them. His shoes let him use fire to boost him into the air without melting the shoes. Also, for some reason, in this game som of his spikes are upward like Super Sonic. The Wii Motionplus lets you pull off amazingly accurate combos with the fire powers you have. There is also a Glacieo gauge, which once full, lets you unleash the Flame Of Glacieo. Seeing as, unlike Sonic (Although in Grinder canon, he didn't get fully sapped of werehog energy, so Sonic can go werehog) the Crystal Devil didn't sap energy out of Grinder, so at night, Grinder turns werehog. He can't use firebending in werehog form, but his arms come in handy. You can also play as Sonic and Ripper in different versions of Grinder's stages.