TychoGfx is a graphics viewer for Pokémon Ranger. It can view most graphics, play their animations and dump their individual frames. This was a side project that I worked on last year. It's mostly finished, but the animation sequencer is not 100% finished yet as the "shaking" has not been properly figured out yet. The source code and downloads can be found on the Github repository.
You Switch needs to be able to connect to HOME. If you can't connect to HOME, it likely won't work.
IP address can be gotten from pressing Y on homebrew launcher, if I'm not mistaken.
Alternatively, you should be able to get it via checking your Internet Settings on the Switch.