If you are playing the game on an emulator, you are required to show the entire window of the emulator, including the window border. The use of things like speed-up/slow-down, save states, or input playback is considered cheating and is thus banned.

All current runs performed on emulator are exempt from this rule. All runs to be submitted after this rule change are subject to these new standards.

what about the save need to use it in a emulator?

If you're using DeSmuME you should be able to click "file" Then click "Import backup memory" find and open your .sav file in the window that pops up then click "AUTO (from imported save data size)" then click "OK" and it should work from there