Hex editing gen 1 and 2 games

[Wheeler]

I was wondering how I can change the game file of my red version to a yellow version save file. like not just dumping the save on a yellow version game and then just thinking it's an actual yellow save. 

 

It's also the same with GSC, how can I change the file of my gold save so it is recognized as a crystal save file? 

 

the other problem I have is changing the language of a save file. I am wanting to change an English save file from either gen 1 or 2 and then make them Japanese.

this probably isn't clear but I hope someone understands and can help me. Thanks!