1. The bad ending:
Lose to Lavos in any time period, any method of getting to him. If you lose the fight against Lavos, you see Lavos coming out of the earth, the command center in the future collapses.
2. Programmers ending:
Beat Lavos either at the Ocean Palace, or before you rescue Queen Leene in 600 AD. You end up at the End of Time. Each of the characters you see represent actual members of the Chrono Trigger development team. They say a variety of things: from saying hello to their family, jokes about how long and hard they worked, boasting about what they did, etc. One of them says: "Legendary Programming waiting for that Special Someone. Keep those cards and letters coming."
3. Frog & Leene ending:
Beat Lavos right after coming back from 600 AD and saving the Queen. You end up at the Fair. Some people tell Marle she is dressing normally, while others say she is in a costume. When at the Castle, the King says they have just found a 400 year old wedding movie. Frog and Queen Leene (or a descendent) are married, and Marle's father is a frog.
4. Monster slapstick ending:
Beat Lavos right after entering the End of Time through the bucket. During the credits a Nu and a Ribbit are chasing each other and doing various antics. The Nu keeps falling asleep while the Ribbit is harassing it. "THE END" has two 'Z's above it.
5. Robo / Tata ending:
Beat Lavos after arriving in 600 AD, right after returning from 2300 AD. The first scene shows Robo and his wife (or girlfriend) in front of the Leene Bell in the Future. The next scene shows Tata sitting on the throne with King Guardia & Leene standing around. Tata jumps off the throne, runs after Magus, only to find Crono, Marle, and Lucca laughing at him.
6. War Ending:
Beat Lavos right after getting the Hero Medal from Tata. During the credits, there are a number of clips of scenes with the various characters. Most are about scenes that you wouldn't see and characters you haven't met: Crono, Marle, and Lucca coming out of the closet in the monster village; Kino & Ayla chasing reptites; Magus at the cove with his three henchmen; King Guardia & Queen Leene; Frog in the Cursed Woods; and at the end Robo running across the screen.
7. Cast of Characters:
Beat Lavos right after returning from getting the Red Stone in 65,000,000 BC. While the credits are rolling, various still characters are displayed singular or in groups around the credits.
8. Frog vs. Magus:
Beat Lavos right after Frog releases the power of the Masamune in 600 AD. During the credits you see scenes of Frog. He defeats each of Magus' fiends, and then goes after Magus himself. After the battle with Magus, you see Frog standing on top of the statue above the gate to Magus' castle.
9. Reptite ending:
Beat Lavos right after defeating Magus. The opening scene is repeated, except that Crono and his Mother are Reptites! When you go to the Millennial Fair, everyone there are reptites as well, except for the Green Jogger, who is human. After the credits, Azala is alone on the screen, and "THE END" drops on her.
10. Frog and Magus II:
Beat Lavos right after defeating Azala in 65,000,000 BC. During the credits, you see a scene of Frog approaching a statue with two chests.You also see a number of scenes with Magus, Schala, and Janus.
11. Marle and Lucca's slideshow:
Beat Lavos after Schala opens the sealed door in 12,000 BC. Do not power up the pendant though.
12. Millennial Fair Moonlight Parade (without Crono and Magus):
Beat Lavos right after beating Magus. If you defeat Magus, he tells you that you have released the curse on the Frog. However, during the rest of the game, Frog looks the same. If you use the bucket to beat Lavos right after killing Magus, but without restoring Crono, you end up at the Millennial Fair similar to the ending if you don't fight Magus. However, the only character you see in the middle part of the square is Lucca. When you go into the north part of the fair, the other characters (except for Crono and Magus, of course) come out of the time gate. Except that Frog is now human, and Lucca thinks he is quite a hunk! The other characters go back for Crono, and Lucca & Marle go to see the king hand the bell. Then they leave on Epoch while the king is stuck trying to hang the bell (similar to the "Family Reunion" ending ) If you crashed into Lavos with Epoch, the ending you get is almost the same as the regular "No Crono" ending, except that Magus doesn't appear.
13. Millennial Fair Moonlight Parade (without Crono, but with Magus):
Beat Lavos after teaming with Magus. If you beat Lavos before you restore Crono, you end up at the End of Time. Everyone is lying on the ground. You can control the characters, and when you talk the Guru, and he tells everyone that the gate is closing and they have to leave. All the other characters except Lucca and Marle leave to their respective times. Marle arrives at the Fair, walks in the Moonlight Parade by her self. She then sees the team members throughout the fair crowd. When she goes back to the north part of the fair, they are all there. The other characters go back for Crono, and Marle sees her father, who asks her to install the new bell he has made in her honor. She is carried off by the balloons while the credits roll. She lands near a tree like the one on Death Peak, and in the distance you can see Crono coming. Marle runs towards him and the screen fades to black.
14. Millennial Fair Moonlight Parade (with Crono, but without Magus):
Beat Lavos after beating Magus and saving Crono. If you killed Magus, he doesn't appear in this ending, but the rest is pretty much the same as the next ending. Also, if you didn't get a clone before Crono is killed, talk to the Keeper and he will tell you to go to the fair.
15. Millennial Fair Moonlight Parade (with Crono and Magus):
Beat Lavos after teaming with Magus and saving Crono. If you defeat Lavos after restoring Crono, the opening scene of the game is shown, except that it is a soldier waking Crono up, saying he will be executed. The king pretends to be upset, but then praises him for saving the past, present, and future. If you let the Chancellor out of the chest after the "Rainbow Shell" incident, he will be there; otherwise, it will be Pierre, the lawyer. Several characters appear (Doan, King Guardia from 600 AD, & Kino) saying what the team members had done. Marle realizes that these characters are her ancestors and descendants. After the Moonlight Parade at the fair, the characters assemble at the north side of the fair grounds and leave.
If you didn't crash Epoch into Lavos, then Crono's cat jumps into the time gate, followed by Crono's mother. If you got extra cats, they all jump in together. Crono, Lucca, and Marle take the Epoch to find them. Meanwhile, the king is stuck trying to hang the Nadia Bell.
If you crashed Epoch into Lavos, then the gate closes after the team members leave, and Marle, Lucca, and Crono talk to the King, who shows the Nadia Bell. Marle ends up holding some balloons and starts to float away. Crono jumps on, and the two of them float away while the credits roll.
Note: Variations on the Moonlight Parade Endings:
The Fair endings will vary slightly depending on whether or not you used the Epoch to get to Lavos, and whether or not you saved Lara from being crippled. It also depends on how many cats you have at Crono's house.