• Legs because that’s what a gundam has and literally no other reason. This way the creator can pretend he’s made a robot suit.

      Wheels because mechanical legs that imitate human movement are wildly impractical and fragile. Humanoid robots are basically pointless, a lot of mechanical complexity with no practical benefit.

    • I haven’t seen that much Gundam, but I think most/all Gundam have wheels in addition to legs. I guess it’s the best of both worlds. Wheels are best for even terrain, and legs enable traversal of uneven terrain and jumping. In fiction of course. In real life, we can’t build anything that complicated.