First of all if a game does not work with SAVESTATE on it is up to you to test with SAVESTATE off.
Second of all if a game does not work with SAVESTATE it doesn't mean N8 is not "as compatible", SAVESTATEs were an invention of software emulators and if N8 supports them here and there good for you, if it doesn't in your preferred game so be it.
Third of all you never said in which conditions you were attempting to run it, you never said "these are my settings", you kept on going on that it didn't work, and yet it does work, so take same blame please, Skinny simply didn't like your statement that said "I have tried many versions of this game and none work on everdrive N8 ! so Konami Wai Wai World 2 don't work on everdrive N8." when he just told you he played it and a few people are telling you it works.