Here is a pair of kids sneakers that were found in France around the time of the Sonic & Knuckles release. They're clearly to help promote the game with the SK symbol on the tongue there. There are nice, other Sonic elements all around as well, such as the Sonic & Sega logo on the velcro strips, Sonic word on one side & the classic logo font in blue on each heel. There is also a pattern of simple silouette Sonic faces (in blue) for the fabric on the edge of where the foot goes in. The sole does not seem to have any specific detail. They DO have a light up feature/lights flash when you step. When these were made, such a feature was a very new thing.
What's they mystery?
Who made the shoes? The brand has rubbed off because it seems it was only under the sole of the clearly-quite-used shoes. The clue to solving it is the shape of the treads on the bottom. Notice how it is made of paw prints like a dog. They wrap up the sides of the sole too, showing 4 little paw shapes in arches along the front. The manufacturer probably uses the same sole pattern for 'kids sneakers' regardless of the franchinse/branding that they're doing for the uppers. You can write in if you know more about these shoes.