Its a glitch that keeps Peach's turnips at a certain elevation and stay there forever, if someone gets into the turnips they stay there forever and can be smashed by Peach or someone else and takes a crapload of damage, here's the video:
http://video.google.com/videoplay?docid=5698408923927326067&q=ssbm&pl=trueSteps to achieve the glitch:
1. choose 4 characters, 3 is possible but its way harder
2. make sure 2 characters is Fox/Falco, and 1 is Peach, the 4th character can be anyone
3. Turn on teams, make the
4th character be in the same team as a Fox/Falco, and have Peach and the other Fox/Falco be on different teams. EX: Samus & Fox is team blue, another fox is team green, peach is team red. NO FRIENDLY FIRE!!!
4. Make items to any setting other than none and make it so that only super scopes appear(you can have any item really but you need the super scope)
5. Choose Hyrule temple as it is the easiest place to do this glitch
6. Do the infinite super scope glitch
6a. Grab a NON - USED super scope, fire 5 normal shots, fire 2 FULLY CHARGED shots and then charge for another shot and have someone hit you while charging, the super scope now has infinite shots.
7. Get the
4th character to hold on to the inf. super scope
8. Make it so that peach is at the "entrance" to the tunnel of life, have the Fox/Falco who is ALLIED to the 4th character be on the LEFT side of the platform near the tunnel of life entrance, and have the other Fox/Falco be on the right platform.
9. Have both Falcos/Foxs hold down their shine forever, down b then just hold b
10. have the 4th character shoot through the allied teammate and into the reflector of the Fox/Falco on the right side of the platform and the shots will repel back and forth, be sure to keep shoooting those shots
11. Have Peach constantly jump and hit the shots while below them, when done enough times a green line should appear where the super scope shots should be
12. At this point have Peach pull up turnips and shoot it into the green line, about 10-13 turnips MAXIMUM
13. Then after the turnips are set simply break one of the Fox/Falco's Shine with any physical attack and you should have turnips that float and gives MASSIVE damage to those who touch it, especially if you got a stitch face into the green line.
NOTES:
1. This can freeze the game
2. This works on all versions of the game, 1.0, 1.1, 1.2
3. The turnips may float away and you will have to repeat the process