List of Super Mario Strikers pre-release and unused content
From the Super Mario Wiki
This is a list of pre-release and unused content for the game Super Mario Strikers.
There are various concept arts depicting Mario in different outfits. In the concept pictures, Mario has on a soccer outfit and some other outfits, like one with a helmet and a GameCube controller buckle belt, and a hooded sweater. Peach is wearing another uniform that is similar to the final version.
These screenshots are from a very early build, depicting Mario and his team of Hammer Bros against Wario and his team of Toads. Their outfits are noticeably different. Mario's jersey is blue and red, but in the final version, it is mostly red. Wario also has a yellow and purple color scheme that is mostly yellow in the final version. Wario's hat in the early screenshots also more resembles a ski hat with a rim than Wario's usual hat. The textures in these screenshots appear to be brighter than those in the final game.
Early videos and screenshots showed that there were no items in the game. The costumes of many characters were very different as well. Donkey Kong had another voice. Mario's voice was also different, making it possible that all characters had different voices.
Additionally, the sidekicks could perform special shots much like the captains' super strikes. The method to pull off these shots were similar, and the attribute of these shots were worth two points. The captains also had special shots but in a different way to the sidekicks'. A sample of this is Mario's special move, where he fully charges the ball and kicks it upwards and then jumps high. On a brief animation, Mario draws a Hammer while a meter appears to determine the number of balls and the power to shoot the ball towards the goal.
All of these special moves were dumped in the final revision of the game but were taken for the creation of the sidekicks' Skillshots and captains' Mega Strikes in Super Mario Strikers's sequel Mario Strikers Charged.
The textures in this screenshot resembles more of the final game, but the stadium is different and the audience is absent. In this version, the characters adapt their current soccer outfit shown in the final version, but in this screenshot, Donkey Kong retains his tie, unlike in the final version.