Mario & Luigi 3D

Mario & Luigi 3D is a game for the 3DS by OptimusPrime27. It has a much different plot from most Mario games, and features Donkey Kong as a playable character, unlike most newer Mario games. Bowser is not in the game, the main villain is instead Tatanga.

Plot
Donkey Kong, Mario, and Luigi are enjoying a fine, sunny day in Dinosaur Land when they see a spaceship land in the nearby jungle. They go to investigate and see the alien conqueror, Tatanga, one of Mario's old foes. Tatanga tells his army of Shy Guys to go and deploy the H2-Oh Devices, machines made to suck up water, in his plan to steal all the water from the Mushroom Kingdom and bring it back to his waterless home planet. Mario, Luigi, and Donkey Kong see, and set out to stop Tatanga's mimnions.

Worlds

 * 1) Koopa Beach - Beach-themed
 * 2) Goomba Mountains - Snow-themed
 * 3) Fiery Ocean - Lava-themed
 * 4) Haunted Island - Ghost-themed
 * 5) Quicksand Land - Desert-themed
 * 6) Tatanga's Base - Variety

Bosses

 * 1) Mouser
 * 2) Kamek
 * 3) Birdo
 * 4) Boom-Boom
 * 5) Petey Piranha
 * 6) Tatanga

Power-Ups

 * Yoshis - Rideable dinosaur companions
 * Super Mushrooms - Turn Mario into Super Mario
 * Fire Flowers - Turn Mario into Fire Mario
 * Ice Flowers - Turn Mario into Ice Mario
 * Mega Mushrooms - Turn Mario into Mega Mario
 * Turnips - Can be thrown at enemies
 * Invincibility Stars - Turn Mario into Invincible Mario
 * Super Leafs - Turn Mario into Raccoon Mario
 * Tanooki Suits - Turn Mario into Tanooki Mario
 * Keys - Can be used to unlock secret doors

Sequel
A sequel, entitled Mario & Luigi 3D: Wario World, has been announced. It is unknown whether or not it will feature Bowser, because Wario will be the main villain. Donkey Kong will still be playable, and Toad will now be playable, too. It will also feature Waluigi as a villain working for Wario.