Saw this last night. I liked it, but I guess mainly because it pokes fun at how absurd the Mario storyline is if applied to reality. "You got kidnapped by something that goes on a salad."
Also, I'm used to the Family Guy skit where two people argue and overlap eachother. At first that sort of thing struck me as "this sounds like a believable bit of conversation", since you can't hear much of it, it just turns into heated bickering. The example I usually point to is when Nate Griffin becomes one of the tellers at the DMV, resulting in bickering of waiting in lines for hours (seriously, what's up with that, only one or two lines out of 50 are actually used) and not being able to call the DMV in advance. Now I just try to hear enough of the conversation so I find something to laugh at.
Also, I was distracted by this being done in the unmistakeable Family Guy look and Mario sounding an awful lot like Stewie,
As for Robot Chicken... well, I hate it now, but in the past I did like the random acts of sudden violence. But here, the violence did nothing to me.
One of my favorite Robot Chicken skits was the sendup on Dragon's Lair. One scene has Dirk stuck in bumper-to-bumper traffic, and every few seconds the player pushes right on the joystick to move Dirk's car forward an inch.