Diorama box pixel

[prismcard]

Hello, I'm new to the forum and I'm sorry about my English as I use google translation.
Sincerely.
I don't know if my request is appropriate, sorry if I break the rules.
I would like to create a dragon ball z diorama box
I was wondering if there was a template and how to resize the sprites, background without losing image quality.
Kind regards.

[Shade]

What are you going for exactly? What is the image? It'll be easier to give specific advice that way.