Hmm. I think that wording is right. Not sure. Let me know otherwise with what the proper templating would be!
Anyway, what's supposed to happen is that the opponent is forced to block both creatures or none of them at all. The flavor is that they're both in the same coach. Thus, it's impossible for one to be stopped without the other being stopped.
Also, the fact that this guy is inviting another person into his carriage seemed like a PERFECT opportunity for soulbond. In fact, the art of Nephalia Smuggler is more fitting for a soulbond creature than, say, Wingcrafter is! It's so natural.
I realize that this card's power level may be low. He has higher toughness because the vehicle provides some toughness.