Eh first of this would probably better be posted on the pkhex subforum found here
But to partially answer your question anyway, I would understand Ability Urge. It is an item that exclusively has a use in gen 5's Wonder launcher battles. The Odd Keystone is an odd one though
pun intended :creep:
Given that you made changes to in between the two edits such as pokemon box locations, pokemon at daycare, DNA splicer fusions etc. etc. then yes. If not, no, in fact, you can just copy ramsav.bin to your desktop so you always keep a copy of your latest ramsav accessible. Handy for when you want to check something about a pokemon mid-battle