From the Super Mario Wiki, the Mario encyclopedia
NAMCO Circuit is the second track of the PAC-MAN Cup in Mario Kart Arcade GP DX. Like PAC-MAN Stadium, it is a stadium with a Pac-Man theme, and features sections based off of classic Namco arcade games. Aside from Pac-Man, it features cameos of characters from Dig Dug, The Tower of Druaga, Galaga, and Mappy.
The track begins in an area with 8-bit Pac-Man murals. After a slight curve to the right, the player will move through several Dash Panels. A wide left follows, along with a right turn into a tunnel, entering the track's Dig Dug-themed area, where large sprites of Taizo Hori, Pooka, and Fygar can be seen. The player will make a slight left into an entrance based off of Quox's head, entering an area based off of The Tower of Druaga, featuring various enemies from the game. This is followed by a sharp right leading to some Dash Panels and a Glide Ramp, which launches the player into a Mappy and Galaga-themed area. The player will then make a sharp left, and then make a sharp right to the finish line.