Game:Tidus, Selphie, and Wakka

Tidus, Selphie, and Wakka are Sora's three friends on Destiny Islands, and are a set of optional bosses found in Kingdom Hearts. They ask Sora to have practice fights with them on the first and second days on the island. After defeating each of them individually, Sora can ask to fight all of them simultaneously.

Kingdom Hearts
Tidus is a little bit tougher than Selphie or Wakka, but the match is simple. Just like Sora, Tidus fights with a wooden sword. The best way to defeat him is by dodging his strong attacks and trying to jump behind him and while still in the air attack him with an aerial combo. Also, to get some Tech Points, try parrying his attacks by striking at the same time he swings and you will stun Tidus, allowing you to get in one or two combo's without interruption. After a few rounds of this you'll win.
 * Tidus

Selphie fights with a jump-rope as a toy version of sorts to her original nunchucks. During the fight, if Sora manages to deflect her jump-rope, he can earn 1-2 Tech Points. If the jump rope hits Selphie's head in the process, Sora gains an extra Tech Point. It should be noted, though, that if Sora fights only by deflecting Selphie's jump rope, her HP will be reduced to 1 and will not decrease any further, making it a good way for Sora to gain experience before dealing the final blow. Be careful in the battle as it is a bit hard to spot her jumping rope and she could land an attack on you if you're not careful.
 * Selphie