Bowser creates four clones and sends them out to destroy Mario, but they are more than just clones...
Plot
It starts where Mario found himself climbing really high & wonders how to get down. He decides to jump into the lake but fails. He wakes up, realising that it was a dream. Toad tells Mario that he read on a website that Bowser is working on a secret weapon. Mario dismisses this as fake news and even if it is real that he would destroy it sooner or later. Meanwhile Bowser has finished his secret weapon, he does an evil laugh that Mario joins on so he tells Mario to go away, which he does.
Later Mario asks Toad if he has seen Bowser as he hasn't been threatening to kill him yet. He finds that Bowser isn't in his usual place so he goes to check the toilets. Meanwhile Bowser is talking to his four clones of Mario and giving the order to destroy Mario. Back at the castle, Mario is wondering what happened to Bowser when the doorbell rings. He answers the door to find 4 people that look just like him. They inform him that they are clones that have been sent Bowser to destroy him. Mario doesn't believe them and the clones start ti beat him up. Mario flees to bob-omb battlefield where he is met by the clones once more. He tries to run away from the clones, but they manage to catch him and beat him up.
Later outside the castle, Mario writes in his diary that the clones are blocking the castle which is a problem as he's hungry. He decides to disguise himself as a big Mario head. He successfully gets past the clones who simply look at him as he passes by. After getting into the castle he decides to hide, only to find that the clones had used magic to get to him before he could hide. Realising the inevitable, he lets them kick his butt. After a long day of getting beaten up by the clones he decides that he needs to fight back and take the clones out one by one. Meanwhile the clones decide to split up and patrol different parts of the game so that Mario won't have anywhere to hide.
Mario travels to bob-omb battlefield, after getting everyone's attention, he tells them his plan. As one of the clones enters the battlefield, he gives the signal and the entire battlefield starts to pull towards the clone. After a while he tells them to stop, thinking that the clone is done for. But instead the clone turns around with the eyes now completely red, it's a robot. The robot clone locates Mario and prepares to destroy Mario. He reactivates the magnetic pull on the clone, but the clone manages to disable the cheat code and calls for the other clones to come.
Mario quickly runs off when the other clones arrive so they split up to search for him. He manages to catch clone 4 off guard and knocks off it's head, which causes it to explode. In order to get across the battlefield he decides to take the cannon and in the process, he takes out clone 3. Clone 2 confronts Mario so he pretends that he is another clone, the clone states that he is lying so he gives the clone a paradox that causes it to blow up. He then faces the last clone at the top of the battlefield. The clone pulls out a gun and shoots at Mario who manages to avoid the bullets, but before he gets to do anything the clone punches Mario and deals 100 damage to him. He decides to fight back and brings in king bob-omb who he throws at the clone. In a last attempt to take out Mario, the clone unleashes a powerful missile strike that can be head from peaches castle. Unfortunately for the clone, Mario managed to take cover and instead injured itself. He watches as the robot breaks down and blows up. Having won the battle, he dances to his victory theme as the credits roll.