Basically they were spoiling for a fight. Tybalt was looking for Romeo in order to fight him, but Romeo didn't want to fight Tybalt. Mercutio didn't like Tybalt at all and was looking for a chance to fight him. He used the situation as a pretext to challenge Tybalt, who was not a man to turn down anyone's challenge.
Romeo finally fought Tybalt because Tybalt killed Mercutio.
Tybalt Killed Mercutio and then Romeo was so cross he decided to kill Tybalt! =) x
Tybalt's aggressive nature and desire for revenge directly lead to Mercutio's death. When Tybalt confronts Romeo, Mercutio intervenes to defend his friend’s honor, challenging Tybalt instead. During their duel, Tybalt mortally wounds Mercutio, which sets off a chain of events that ultimately leads to further tragedy in the play. Thus, Tybalt's actions and vendetta against Romeo create the circumstances for Mercutio's fatal injury.
Mercutio and Tybalt were having a brawl, when Tybalt actually thrust his sword into mercutio, causing him to die. Romeo gets revenge for Mercutio, and dukes it out with Tybalt until he finally killed him.
Romeo kills Tybalt in Act III, after Tybalt has killed Mercutio in a duel.
From: Benvolio To: Prince Escalus Date: 5th June 1651 Subject: The killings of Mercutio and Tybalt. This will explain the deaths of Mercutio and Tybalt. The Montague's and the Capulet's have been sworn enemies for years. Tybalt was leaving the streets to get away from Romeo because Tybalt had killed Mercutio and he knew that Romeo would not agree but then Romeo slew Tybalt. I wanted Mercutio to leave the streets because I am a close friend to Romeo, but he would not go because he wanted to kill Tybalt. When Tybalt arrived he wanted Mercutio not to walk. Mercutio was offended because he did not agree with Tybalt. Mercutio did threaten me. I fought with Mercutio because he had threatened me. Romeo said "This days black fate on more days both depend, this but begins the woe others must end" Romeo wanted to stop because he thought if they die he will. Mercutio died because Tybalt had slew him. Romeo chased after Tybalt because he had killed Mercutio I think Tybalt is most to blame because he started the killing.
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.
To them its just a hobby or a sport until it leads to death were Tybalt kills Mercutio and later Romeo kills Tybalt.
Mercutio. According to Mercutio, Tybalt is "the very butcher of a silk button."
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.
mercutio didnt kill Tybalt, Tybalt killed merctio and then romeo killed Tybalt.=D
Romeo knew that Tybalt wanted to fight him because Tybalt had sent a challenge letter to Romeo's friend Mercutio. Mercutio then informed Romeo that Tybalt was looking for him to seek revenge for crashing the Capulet party.