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![knuckles the echidna and big the cat (sonic and 1 more) drawn by uno_yuuji](https://cdn.donmai.us/sample/8b/e6/sample-8be6d57f0c01caa4883e25c08f9a9d9a.jpg)
Artist's commentary
As the train headed for Metal City departs, Knuckles looks forward to a new challenge.
Pict by: @SonicOfficialJP
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Knuckles sitting on a train holding his Extreme Gear and looking out the window at Metal City from Sonic Riders.