i'm not sure on an ordinary Leapster, but on my leapster 2 when it comes to sign in, you press home, A and the left arrow. Then an X will appear at the bottom of the screen. You can only delete a name when there are 3.
Question
How do I delete or change a player name on Leapster™ cartridges?
Answer
It is possible to remove a player once you have added three player names to the cartridge. If there is a name on the cartridge that you want to remove, take these steps.
1- Add new players until there are three players on the cartridge.
2- Once you have three players on the cartridge, an "X" will appear below each player's name.
3- Touch the "X", then touch the name of the player you want to delete. Touch "Yes" to delete the name. Then add a new name, or touch OK twice to go back to the sign-in screen without adding a name. Two names will always remain on the cartridge.
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