Put the ending for the character (def file, sff file and sometimes there's also a sound file) in the same folder as the characterThen, open the def file of the character, and you'll see some lines underneath [arcade]add the name of the def file to it, such as :ending = name_of_def_file.def
Sometimes, some def files don't have the arcade parameter.Open several def files of several characters you have, and at the end of one of them, you'll see a [arcade] parameter with two lines underneath, one for the ending and one for the intro.Copy paste these lines into the def file you're interested in, and do what I said before.
1. Download an ending2. Find a characters def file and open it with notepad or whatever3. If it isnt already at the bottom of the def file: leave 1 line open after the last line and under that put this: ; Arcade mode[Arcade]intro.storyboard = ending.storyboard = 4. Put the ending files in the characters map5. The ending must have a def so after ending.storyboard you need to put the name of the def file and after that add .def