Mercutio does not "save Romeo" in the play by fighting Tybalt. Tybalt is about to walk away in contempt of the coward Romeo who will not fight him, and Mercutio gets involved, ostensibly to save Romeo's honour but basically just to get into a scrap.
In the 1996 Baz Luhrman movie, the director has Tybalt beating Romeo when he will not fight, which does prompt Mercutio to join the fight. In that version Mercutio thinks that Tybalt will kill Romeo and that he needs to intervene to save his life. It's a more flattering read for Mercutio than what Shakespeare wrote.
Mercutio was spoiling for a fight with Tybalt, and he uses the excuse that Romeo is being cowardly as an excuse to get it.
When Tybalt and Mercutio fight, romeo trys to defend Mercutio but ends up having him killed. Mercutio dies from Tybalt bringing the sword from under Romeo and stabbing Mercutio.
earlier in the play, romeo crashed a Capulet party. angry, Tybalt swore revenge with a sword fight. Romeo's friend mercutio ends up fighting Tybalt, and romeo attempts to intervene by stepping between them. Tybalt stabs mercutio, despite Romeos attempts to end the fight, and mercutio dies. Romeo and Tybalt then fight, and romeo kills Tybalt, and romeo is banished from Vienna. Merutio, romeo and Tybalt sword fight.
Mercutio starts the fight that ends with Romeo fleeing the city.
Romeo refuses to fight Tybalt. Mercutio steps in for Romeo and fights Tybalt. Romeo steps between them, trying to stop the fight. Tybalt stabs Mercutio. Mercutio curses both the Capulets and Montagues. Mercutio dies. Romeo is enraged and decides to fight Tybalt. Romeo kills Tybalt, then he runs. Prince Escalus comes to the scene. He announces Romeo's banishment.
Mercutio is the one who decides to fight Tybalt.
When Tybalt and Mercutio fight, romeo trys to defend Mercutio but ends up having him killed. Mercutio dies from Tybalt bringing the sword from under Romeo and stabbing Mercutio.
earlier in the play, romeo crashed a Capulet party. angry, Tybalt swore revenge with a sword fight. Romeo's friend mercutio ends up fighting Tybalt, and romeo attempts to intervene by stepping between them. Tybalt stabs mercutio, despite Romeos attempts to end the fight, and mercutio dies. Romeo and Tybalt then fight, and romeo kills Tybalt, and romeo is banished from Vienna. Merutio, romeo and Tybalt sword fight.
Mercutio starts the fight that ends with Romeo fleeing the city.
Romeo refuses to fight Tybalt. Mercutio steps in for Romeo and fights Tybalt. Romeo steps between them, trying to stop the fight. Tybalt stabs Mercutio. Mercutio curses both the Capulets and Montagues. Mercutio dies. Romeo is enraged and decides to fight Tybalt. Romeo kills Tybalt, then he runs. Prince Escalus comes to the scene. He announces Romeo's banishment.
Mercutio is the one who decides to fight Tybalt.
Mercutio believes Romeo has become feminine after falling in love, but he quickly moves to fight Tybalt when Romeo refuses.
It was when Tybalt killed Mercutio and Mercutio blamed Romeo for it.
Romeo finally fought Tybalt because Tybalt killed Mercutio.
Tybalt was asking for a fight with Romeo. Since he was married to Juliet and Tybalt was now his cousin, he refused to fight him. Then Mercutio asked to fight Tybalt and in a way kind of tempted him to fighting. Tybalt ended up killing Mercutio because Romeo got in the way when trying to stop the fight between the two. So now Romeo is angry that his friend Mercutio is dead and Tybalt doesn't have a scratch. So, Tybalt and Romeo fight and Romeo kills Tybalt.
if you mean fight, then Tybalt after Tybalt had killed mercutio
Tybalt is angry because Romeo and his friends (including Mercutio) crashed the Capulet party, and really angry because Lord Capulet wouldn't allow Tybalt to throw them out of the party. Tybalt tries to get Romeo to swordfight with him, but Romeo (who is by now secretly married to Tybalt's cousin Juliet) refuses and tries to make peace with Tybalt. Mercutio is enraged that his cousin Romeo won't fight, and says that if Romeo won't fight Tybalt then he will. Tybalt and Mercutio begin swordfighting. Romeo, still trying to achieve a peaceful solution, jumps between the two and tries to push Mercutio safely away from Tybalt. This makes it impossible for Mercutio to use his sword to defend himself. Tybalt, seeing Mercutio's chest exposed under Romeo's upraised arm, fatally stabs the defenseless Mercutio.
Romeo fights tybalt because while tybalt and mercutio were fighting, tybalt accidentally stabs mercutio under Romeo's arm as he was trying to stop it. Romeo then wanted to get revenge on tybalt for killing mercutio.