Making a specific type of animation (Need Help!

Ok so, I am doing a request. Originally it was supposed to be in another program, but they wanted something done in blender so here I am. Basically, they want a certain type of animation applied to the model and then exported into an .fbx and an .obj file for use in Unity. The problem is, I am inexperienced with animation so I haven’t the first clue. They want the animation done as if it were a 2D pixel-art style animation using frames. I will attach a gif you can refer to as an example.

I am not sure how to do this so if I can get some help it would be greatly appreciated.

-Ryul-Z

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Your question is very open-ended, which makes it difficult to answer. Blender is not a pixel-art program, but you may be able to get a similar result using 2D Character rigging. Attached is a link to a tutorial that could get you started.