What have I done to my game?

I was watching [this][1] and because i’m dumb I watched the video and did exactly what he did as he did. He told me to change the Pokemon backup (I think) file to a .txt file so I did, and I put my SD back into my DS. So later he say’s in the video ‘‘never leave the file as a .txt file, always put it back with .bin format BEFORE you put it in your DS’’ O my god what did I do. by the way I backed up the original file as said and replaced the old one as I was told to in the video (It was a .bin file).

What did I do to my game?(If possible) Has this any negative effects on my 3ds?

If this is banned fine but I don’t think I broke any rules.

Edit: Ok guys just to let you know my game works perfectly, no errors whatsoever that I have seen so far. If your going to answer this give the effect AND a reason ‘‘you just f**your game’’ is terrible, seriously. HOW did I apparently Fmy game and why?[1]:https://www.youtube.com/watch?v=0Sau6iqSsEE

Pleaselog inorregisterto add a comment.

What you did was tamper with the save, now it’s a time bomb. It could be legit forever and stay there peacefully until you start a new game, or it has a chance to go off and… I don’t actually know what happens,possibly nothing. If this were me (and this might not be what you would do), I wouldsend allof myvaluables to a friendfor safe keeping. This shouldn’t set off the file as long as you let it force save and don’t interact with anything hacked. Now you have a boxful of meh Pokemon. Let them sit there, anything you’d be worried about losing is already gone. If you still have a copy of the Pokemon you were cloning, don’t interact with it. The genuine mewtwo, or whatever you were cloning, is also safely tucked away. At this point, you can start a new save file, or not. Doesn’t matter. Everything you care about is safely tucked away.