You can easily create your own animated sprites in Scratch (and I'm sure you can draw better ones than mine!)

 
Start by deleting the Cat sprite that is already there.  Then choose Paint New Sprite paint sprite icon
Using the drawing tools, draw the first frame of your animation and click OK.

Now go back into costumes for your new sprite.  On costume1, click Copy

copy icon

For costume2, click Edit.

Use the drawing tools to make some changes to your new sprite.  In this case, I am going to move his arms down, and then move the whole sprite upwards a bit, so he looks like he is jumping.

Next go to the Scripts tab. 
Create the following script:

script

  Click the green flag to see your animation.