So, I was looking over the Shield Space Rig and wondered, can this character
carry another character(s) despite having 0 Passenger capacity? So the only character who can potentially be aboard this character is the driver? Would just like some clarity.

I'm not very experienced with vehicle rules but as a general rule I'd say you would be correct in just the pilot and no passengers but could still use the innate carry ability to carry a smaller character as per this answer in WIN.
http://win.wizkids.com/bb/viewtopic....4fc0cfc#p17929

However the space rig gives the symbol so I think you should be able to use the carry from that as well.

I've been wrong before though and it's 4am and I've just woke up with a bad back so not the best time for me to be answering rules questions,

It was ruled that the "0 Passengers" would apply to other sources of Carry as well. Much like other figures that have Carry modifications, those modifications only apply to sources of "normal" Carry. The Size Carry gets around those limitations. The exception being not being able to use Carry, like AVAS Falcon's Master Aerialist which prevents him from using Carry during that power, or Devil Dinosaur who can't use Carry at all.

Hopefully that all made sense.

I can't find the Space Rig-specific ruling anymore, looks like it was just rolled into the general vehicle thread. But this was answered when the new size rules came out. The Rig can Size Carry, but otherwise, it's not going to be able to Carry anything else, regardless of how many sources of Carry it has.

Makes sense and Interesting to know thanks for the info.