LostMediaWiki Page: Super Mario Ultra 3 (Partially Found Blueprints of PlayStation game; 2000)
Super Mario Ultra 3 was a planned sequel to Super Mario Ultra 2, which Nintendo producer Yoshiaki Koizumi had referred to being developed in 2000. However, the game was never completed, and was abandoned in favor of titles for the then upcoming Gamecube.
Background
The 1999 PlayStation title Super Mario Ultra 2 was released in July 1999 to universal acclaim by critics and fans of the Mario franchise. In January 2000's Nintendo Power issue, Yoshiaki Kozumi announced that he would be using left over levels from both that game and 1997's Super Mario Ultra to create a third Mario game. Stating that he would likely start work on it once he was done with his contributions to The Legend of Zelda: Majora's Mask.
However, Koizumi realized that the game would be coming out near the end of the PlayStation's life. Indeed, by the time the interview came out, the next Nintendo-Sony console had already become named the GameCube. As such, he gave up on the project and instead went to create Super Mario Sunshine and Super Mario Director on the GCN later in the 2000s.
Details
The few known details about the game were featured in Koizumi's interview for the Nintendo Power issue. In the article, he expressed a desire to expand the role of Prince Cream, Peach's brother who was introduced in Ultra 2. While he did not confirm he would be playable, it is highly probably this is what he meant. In addition, he did confirm more power-ups from the 2D games would be returning in various ways.
Additional interviews revealed that he had thought of Princess Peach and Princess Daisy being featured as third and fourth playable characters. Suggesting that multiplayer would be more prominent than in the first two games. Koizumi even claimed he had a prototype of all four running on a split-screen series of levels from the original Mario Ultra.
Another interview, this time in Iwata Asks with Miyamoto, revealed that Koizumi had not penned the 2000 Super Mario Cubed GCN tech demo as this third PSN installment. Stating that rather, it was to show off the sheer power of the GCN.
Re-emergence
On June 3, 2017, a series of screenshots were leaked to Nintendo's official twitter. These shots depicted Mario, Luigi, Peach, and Daisy in various worlds from the two released Ultra titles. Both princesses wore dresses more akin to their attire in the Mario sports titles of the same era. Last but far from least was concept art of Prince Cream in a level with Mario and Peach, in which the latter wore blue like her little brother, implying Cream would have been an unlockable fifth character later in the game. Koizumi later stated in a 2015 interview that the shots were indeed authentic, and explaining that levels from the past two games were used to test the new multiplayer format.
Today it's still unknown if Super Mario Ultra 3 was actually fully developed. As the screenshots were only of the mechanics being tested on levels from the previous games. What is known is that Ultra 3's planned multiplayer was used in the first game's DS semi-remake Super Mario Ultra 1.5, where Yoshi and Wario joined the Marios as playable characters. This roster would eventually appear again in the 2013 Unity title Super Mario Inc. Which also featured Cream in a prominent role as the victim of the Koopa Troop's antics.