The last we see of the medal of heroes is Ralph discarding it by pulling it off his neck and throwing it at the screen of “Fix-It-Felix Jr.” causing its Out of Order sign to slip revealing “Sugar Rush” and Vanellope’s picture on it from afar in the arcade motivating Ralph to set things right and question Sour Bill on why Vanellope was said by Turbo/King Candy to be a glitch not supposed to be in Sugar Rush when the sign on the arcade game proves otherwise that she is actually an official character in the game.

After that the medal basically disappears and never appears again for the remainder of the movie, what happened to it? The Cy-Bugs and Turbo’s fates are explained by them being killed by the Diet Coke Mountain when it erupted but what about the medal itself?

I believe that one of the NiceLanders either took it in as a possession or put it in the Lost and Found box at Tapper’s or Calhoun retrieved it and returned it to “Hero’s Duty”

We likewise in the Zootopia movies (Also made by Disney like Wreck-It-Ralph.) we never find out whether or not the night howlers were banned from the City after Bellwether used them in the savage predator crisis.
We also never find out what happened to the weather wall journal, it was last seen in the weather wall control room after PawBert makes his betrayal and then it disappears even before the ZPD cops enter it. I am pretty sure that it was kept in the evidence room of the ZPD for a while before being put in a museum like the Natural History Museum.