>>55123026Start a Yellow save file, play until you can restore one of the fossils, trade that to Crystal, then start another save file in Yellow (this time one where you will actually finish the dex) and trade the fossil back to that one while picking the other in the new file.
Or are you saying that you already have access to Red & Stadium, but decided to arbitrarily limit the challenge to only Yellow & Crystal until realising it's not possible? Your lust-provoking image is preventing me from making any further assumptions, you should have explained your circumstances more thoroughly if you wanted a good answer.
