Waddle Dee Train Tracks is the twelfth and last stage in Kirby Fighters Deluxe. The arena is based on Stage 1 of Old Odyssey, the third level in Kirby: Triple Deluxe. Waddle Dee Train Tracks is also the only unlockable stage in the game, requiring StreetPass data from Kirby: Triple Deluxe.
Waddle Dee Train Tracks features a couple of floating platforms at different elevations; the one to the left is up high whereas the one to the right is closer to the ground. The main hazard is the Waddle Dee Train, which can come from the background or from one of the sides. The Waddle Dee Train can easily be seen approaching from the background, but when coming from the sides, a warning sign, in the form of a yellow diamond with a black exclamation point, also appears on the side the Waddle Dee Train is coming from. Standing on the left platform or floating high enough will prevent from being hit by the train. When coming from the background, Kirby that are hit fly into the screen before reappearing on the arena. If the Waddle Dee Train comes from the side, Kirby will be flattened if on the ground, or sent upward if in the air. The music that plays here is called "Floral Fields," the music that plays in the first stage of Fine Fields and Old Odyssey.