Cute! Y'know there was a deleted scene where Stitch kills poor Pudge.
Lilo picks Pudge out of the water and kisses him, she holds him over to Stitch telling him to kiss him too, but Stitch swipes at the poor fish sending him flying out of Lilo's hands. Lilo picks him back up and find that he's dead. Lilo brings him over to the gravestones of her parents and buries him there. Watching her, Stitch realizes he did something wrong.