I tried replacing the cry using Advanced cry editor but no luck, the crackling is still there =,( . And I hate to see my beloved Blaziken have such a distorted cry =,((((.
Also, the save isn't an issue cause I checked it... sigh =/
Unfortunately, for now this is something I cannot figure out to fix. It may have something to do with the ROM's coding which is unfixable, I have tried solutions but they haven't been successful.