Tried looking, but didn't see them so sorry if I missed them. Just some code ideas I'd love to see for White 2:
1. Change Reversal Cave to B2's
2. Change Route 4 to B2's
3. Force a random fan to come through Join Avenue. (And if someone wanted to take it a step further--a specific one in case someone was trying for a specific shop)
4. All Medals unlocked
5. All Pokemon World Tournaments unlocked/completed.
6. Unlock Battle Subway Trophies in your room.
7. Change backsprite to one of the Pokemon Studio Backsprite costumes.
8. Trainer Card Modifier - To explain, I do mean the actual card and not so much the data. So let's say if someone actually did all 5 things, but wanted the 1st trainer card, they could have that. Similarly, if someone had 4/5 but couldn't do the last for whatever reason and really wanted the last trainer card, they could have that one.
9. Unlock all Funfest Missions