[Other Question] How can I fix the rogue pixel problem here?

[JacktheLightningRipper]

I'm adding more sprites to Pokemon Essentials' default "Outside" sprite sheet but the sprites that are already there has had pixels from a sprite above them bleeding into the sprites below and I don't know why as I've barely tampered with them. I've tried manually moving every sprite here up one pixel, but that either knocks the sprite out of alignment or causes pixels to bleed in from the bottom. How can I fix this?