First of all, 10/10 for naming it The Walking Bread

You're right with Scuttle, only one motor driving each side. The motor pinion drives the middle small gear which in turn drives the bottom row which is then geared to the top. I've attached a couple of pictures of it I took at RoboNerd 2018; there's very little inside it! While timing pulleys may be the easier option, there's more chance of a belt slipping or similar, which would knock the walking gait right out of sync and you could end up with legs that move but don't propel you anywhere. With properly meshed gears, once you've set up all the legs in their positions, they won't go out of sync. Just for reference, Scuttle's legs are set 90 degrees apart in the gearing so only has one foot on the ground per side at any one time, whereas Anarchy has 180 degree spacing so has two feet on the ground per side.

scuttle.jpg scuttle 2.jpg