Some sprites are too big and some sprites are too small but it's weird. I know that big pokemon sprites are small in this game and small are big but we can resize any image online. As we have already these sprites, I don't think it's illegal yo use the resized sprites of them. Also here is the way to resize a sprite online.
Go to piskelapp and you can see five icons at the right and click fifth one.
Then click browse image and choose the image you want to resize.
Then you will see a import option and you will see a resize bar and set the size. You can use ratio of height and width same as main sprite there.
Then click import and it will be resized and we are done.
The special feature of this tool is you don't need to draw new sprite and piskel will resize it by itself and it's the best online pixel editor.
Go to piskelapp and you can see five icons at the right and click fifth one.
Then click browse image and choose the image you want to resize.
Then you will see a import option and you will see a resize bar and set the size. You can use ratio of height and width same as main sprite there.
Then click import and it will be resized and we are done.
The special feature of this tool is you don't need to draw new sprite and piskel will resize it by itself and it's the best online pixel editor.