The only box he has is the shipping box I original showed a pic of. There is no other box like premium formats etc. That's why I was upset about the hole in the box because I could see his hand inside and it as right there. He has a styrofoam slab on the bottom, the top, and four styrofoam pillars total, with one on each side. I forgot to mention that it comes with two screws to connect the base to the stand. Be sure that if you ditch the box that you have all the contents as follows:
Slimer
Stand base
Stand rod
Two Screws
Metal rod that goes into the stand
Allen wrench (AKA Hex wrench)
Edition size plaque (only for exclusive version)
I would say he might be able to fit inside the back of your car, but angling him right may take effort to get him in and out. He will need the whole back of the car. I would bring two pillows to put one under each arm. He is awkward to carry, but you can probably carry him fine by yourself. But you may want help to fit him in. He is sturdy enough to survive an accidental bump on the car door, but I wouldn't want to push it as I don't know how it might affect the paint. You don't need his stand attached for the ride home. He should sit fine. Again, prop with pillows and if you have someone who can make sure he stays put it will help. Just make sure to watch traffic as I'm sure you will be turning heads!