Unfortunately I don't know the scores needed. I have outlined ways of getting big scores but this solution is to get your achievement to pop if it glitches.
To get the gold medals on these levels is quite easy. Just remember to use the multiplier freezers when you are at 100x and try to do as many scares / kills in front of a group of bears. Also sabotage as many items as possible. Once all the bears are dead smash everything and get the collectables.
**You can get platinum medals they are better than gold and count towards the achievement.
If once you have got all the gold medals your achievement does not pop, do not worry. It is a pain to sort but can be done. First delete all of the DLC for Naughty Bear. Now clear your system cache.
**To clear your cache go to System settings > Memory. With your hard drive highlighted press Y. This will bring up a menu and select clear system cache.
Now that is clear re-download the DLC but only download chapter 9. Once that is done load up your game, all of your scores and cups should still be there. Select any of chapter 9's levels and play through it. Play through how ever you want. As soon as you finish it with any cup (I did it with a bronze) your achievement will pop.
**If you are checking this because a different achievement glitched in this this DLC, follow the guide right up to the point of replaying a level. Instead all you have to do is fulfill the achievement requirements again (I know its annoying) and they should now pop.
Hope this helps and gets the glitched achievement to pop.