The sword hits don't fit in 16x16. Is there a way to make that sheet work in godot animation player or do I have to make a new sheet that's bigger so the sword fits (for example 32x32)?
Hello Ten! Yes, the animation of the character with the sword takes up 32x32 pixels. I'd say the best way to go is to consider the sword as a separate entity and put it on top of the character. The attack animation was based on the way it is done in "The Legend of Zelda: A Link to the Past", in that tileset the sword is a separate tile to be placed on top of the character (with a given offset).
The best would be to have the two as separate entities in the tileset. I can work on this quite quickly and update the file ;)