Most of the MUGEN times during the fatalities, your MUGEN character is being put in your MUGEN enemy's custom state(s). You may want to get when your "canon style Deadpool" MUGEN character is being put in your MUGEN enemy's custom state(s). You can read about "Custom state detected" by O Ilusionista here:
http://www.infinitymugenteam.com/Forum_345/index.php?topic=33564.0
Perhaps you can try to add a SelfState MUGEN state controller in the [Statedef -2] of your "canon style Deadpool" MUGEN character. I guess you need to look at all the MUGEN triggers used by your target MUGEN characters who can do any fatalities, in order to make your [Statedef -2] SelfState works at the right time....