There is only one way to continue, you must follow these simple steps:
1. Press the power button and remove the game.
2. Run to your local EB Games.
3. Find a copy of FFX-2
4. When the clerk asks you for money, punch him in the face.
5. Run home.
6. Place FFX-2 in your PS2.
7. Press "New Game"

Your problem with the ending screen should now be solved.