About these questions asking about Meenah finding her Sgrub, I think they are trying to ask, how did it end up in that universe to begin with, how did it get on the Frog Temple Meteor etc etc.

The Frog Temple has the game code enscribed in it and is sent from the session through Skaian Defense portals.
Every instance of Sburb/Sgrub that we’ve seen originates from the Frog Temple. Pre-scratch kids: the game was made by Skaianet which was owned by Grandpa Harley who had access to the Frog Temple. Post/scratch kids: game was made by Crocker Corp which was run by the Condesce who had access to the Frog Temple. Pre-Scratch trolls: Meenah had access to the frog temple. Post scratch trolls: Aradia had access to the Frog Temple and then was developed by Sollux.

The only real info we’re missing is who converted what Meenah found into the game.