So basically, i‘m making a scratch project and there is a sprite that changes costume a lot, but when it changes costume, it seems to shake/move a bit. I‘ve tried copying one and pasting it on the other costume, but it still moves. Is there anything I can do to fix this?

Did you make the sprite yourself?
If so, it may be that the costumes are in different locations. It's easy to fix this by grouping the objects and shifting them to the center.
Hope it helped!

I said, I tried copying one of the objects and pasting it on the other costume, but it still moves.

Perhaps you're talking about the costumes being cut-off? On Scratch, round objects are often slightly cut-off and show a flat side. This can show a small motion.

I think the most probable cause of this problem is because the costumes are off-center. Make sure that the costumes are centered completely.

Answer to @helloworldbyeworld

I already said that I centered them perfectly.

helloworldbyeworld wrote:

I think the most probable cause of this problem is because the costumes are off-center. Make sure that the costumes are centered completely.

Answer to @NotGuest102233

Probably, but it was a square-shaped object.

NotGuest_102233 wrote:

Perhaps you're talking about the costumes being cut-off? On Scratch, round objects are often slightly cut-off and show a flat side. This can show a small motion.