Marble Madness II was at Push Start Play in Lewisville, TX. It was the joystick cabinet. I wrote about it here:

Garfield complains about having to run around so much in the game. :)

I only saw a Sky Kid cabinet back in the day once. It was at the front area of our local Wal-Mart. Remember when stores used to have arcade games in the front area? Sky Kid didn't last for long so I think I only played it once. Also it had to compete with Super Pac-Man, one of my favorite Pac-games. Super Pac-Man was at the Wal-Mart for a long time, that's how I got so good at it.