New to ripping. Using dolphin's dump textures.

[SteamyJ]

Hey all. I'm trying to rip the sprites for Bomberman Land 2 on Gamecube. I'm using dolphin's dump texture feature to get some sheets. I was wondering why some of these look so different. Some sheets look perfect while others look choppy.

Good example: https://i.imgur.com/XjGnKZC.png

Choppy example: https://i.imgur.com/XLMdxTc.png

Anyone know why?

Lastly, it is best to put these on blank backgrounds or obscure color ones before submitting? Thanks.