A little while back, I had the random idea of Eggman creating a 'project' in a similar way that his grandfather did, as part of a genetics experiment.

The plan was to create a being who possessed both Sonic and Shadow's Chaos Energy/DNA, as well as the addition of the Chaos Emeralds, so that Eggman can have the creature be just as powerful as Sonic and Shadow, and would increase his odds of finally defeating Sonic.

Eggman left the little creature near his lair and kept a close eye on the area, knowing that it's cries would soon gain the attention of Sonic.

Both Sonic and Shadow arrive at the scene and take in the baby, feeling confused on why it looks like them both.

Over time, Sonic bonds with Sokudo and becomes somewhat of a 'motherly' figure for him, hence this picture ^^

Sokudo is the Japanese word for 'speed', by the way, in case you were wondering~

Credit to SherryBlossom from deviantART for the base!
Original Background Image/Sonic © SEGA
Sokudo © Me