Tidus is the protagonist of Final Fantasy X. He fights the infamous villain Sin.
Final Fantasy X
When the game begins Tidus is talking and signing autographs for fans. He is about to play a Blitzball game which is the sport he is best at. As he is about to play his game an evil appears. it goes by the name of Sin. Tidus falls to the ground but, quickly gets up. He runs away from the entity as it chased him. As he ran you learn about his mentor Auron who you soon find and starts running with you. As the fight off numerous enemies the eventually reach a dead end. But, Tidus hit a gas tank causing it to explode. They go over a falling building from the explosion. The two barely make it over when they see Sin. For a brief moment they talk but, then just like that your warped to the future. You soon see Tidus on the ground of a old temple. Tidus swims towards shelter and fights a few villains. But, on the way a giant creature appears. To big for Tidus to take he swims away to the other side of the temple. When he reaches it he sees a fire that was burn't out. So he went and found objects to make a fire. As he sat there a creature came up again. Right when it was about to take him out the temple doors get busted through and a girl appears. She defeats the creature but, she then knocks him out.
Eventually Tidus wakes up to find himself on a ship. he then see the Al Bhed speaking to him. The same girl who knocked him out tells him what they are saying. So then Tidus and the girl decide to go for a swim. They discover underwater that there is a ruin that could still be working. So they swim down to find a power source. Tidus eventually found one and turned it on. He then swims up with the girl and barely making it after a fight with a giant octopus. They make it back to the ship. Tidus still hasn't had any food and is weak from the battle. The girl walks away but, comes back with food. As he eats he asks for the girls name. She responded that her name was Rikku. The two have a conversation and get to know each other. She had asked him where he was from and he told her Zanarkand. Her eyes got wide and she told him that the place was destroyed a thousand years back. Tidus tells her about Sin. But, after explaining everything Sin came back. He started to destroy the ship and everything on it. tidus started to trip and he fell overboard in to a vortex.
Soon Tidus woke up in water. Out of nowhere a blitzball comes and hits him in the head. A couple people asked him if he was alright. He gave the ball back to them. He swimmed to a captian named Wakka. Tidus had a big smile on his face to actually see a blitzball again. Tidus started to talk to the people. They told him they were the Besaid Aurochs. They then asked about him and where he was from. He told them and they were suprised too. But, so they didn't think he was crazy or anything he tells them that Sin just attacked him and his head hurt. So Wakka took Tidus to go eat somewhere. So they start to swim over a village. Along the way Tidus asks what happened to his village. Wakka tells him but, then all of the sudden he grabs Tidus by the throat and asks him to a favor for him. He told Tidus to go to the temple and Crusaders lodge. Nothing was there so he just returned back to Wakka. Wakka then gives him a place to sleep for the night. He awakes in the morning and Wakka isn't there. So he goes back to the temple and finds Wakka. Wakka tells him the summoner hasn't arrived. Tidus looked towards him to see if the inside of the temple was dangerous. Wakka nodded to him. So without thinking about it Tidus rushes in to the temple.
Once inside the templt Tidus solves a puzzle inside the temple. He then goes to a elevator inside of the temple. But, Wakka stops him and tells him not too. So they then head down into the Chamber of Faith. They see Lulu and Kimahri down in the chamber. Lulu wonders what the two of them are doing down in the chamber. Lulu had no idea who Tidus was a looked towards him. Tidus asked if the summoner was alright. Yuna then walks out of the Chamber of faith and shows her Aeon. With a big smile on her face she and the others walked out of the temple.
It was night time when Wakka introduced Tidus to the crew. Tidus then walked over to yuna. But, he only talked to her for a minute or two. Tidus then leaves and goes to bed. That night Tidus has a dream with Yuna in it. You see them looking for a boat to go back to the village. Then Rikku appears. Then one more person it was his father Jecht. The dream began to become worse and worse though causing Tidus to wake up. He wakes up to hear two people talking.
Tidus peaks out of the tent and sees Lulu and Wakka. They began to argue about Tidus and why he was here. He then hears something about a person named Chappu who was apparently his brother. But, Tidus goes back to sleep and get ready for his trip. Tidus awakes again and goes and finds wakka. Wakka heands him a sword thats called brotherhood. Yuna comes out with a suitcase full of gifts for the temples and they get on the boat. They head off towards Kilika island so Yuna can pray to faith. But, during the ride the boat is attacked by Sin. They fight off Sin but, realize he is nowehere to be found. So wakka dives in the water and finds Tidus unconcious. Tidus then wakes up and is being attacked by a sin spawn. But, togther they defeat the spawn. So they get back on the boat and head towards the island again. Once they reach it they find the island was attacked and many of the people were dead. Yuna goes off to do a sending while others help everyone else out. Tidus went along with her though.
Tidus has never seen a sending before. So as he watched yuna do it he didn't know what to believe. But, after it was done they had to move on. So they took yuna to the temple so she could pray. They find another summoner at the temple and Yuna goes with the to the Chamber of Fayth of the island. He wasn't suppose to go but, Tidus was thrown into the elevator that went down to the chamber. Only Guardians were suppose to go in so lulu becomes a little mad but, in the end he makes it back up with Yuna. So their mission was complete and they helped the rest of the lisland out after that.
Final Fantasy X2
Now a couple years after the previous events Rikku meets Yuna and shows her a sphere that was on Mt. Gagazet. The sphere shows Yuna a person who appears to be Tidus locked up in a prison. After going to find who was in the prison it is showed that its now Tidus but Shuyin. But, they soon find Tidus being revived by Fayth. Because Yuna had saved the world from evil Tidus is brought back. The two hug and cry together. From there on Tidus lives happily ever after.