Hi! thank you so much!! :D

and yup, i use Aseprite, but the resizing process is the same there as it is on photoshop, when clicking resize or change size you must have marked "keep aspect ratio" and then choosing the one you desire, also in the settings the scaling must be set to "nearest neighbor" so he pixels won't be altered. Also there's an option when you select to export your work from the main file which lets you scale it up to 10x :3