>>57376356you go on archived.moe
you go to this thread
you click on the op image's "view same" button
you go to the oldest post
you look around to see if any edits are immediately visible
if not, you can then search for .gif or .webm in the filename search bar with a date range that ends on the date of the oldest post of the op image, scouring until you may find the original groudon image posted
alternatively, you can try using an image search engine to see if it pulls up the original
maybe even AI is capable of assisting in this task
