If you have seen Zenkoina's run (which if you haven't I suggest watching) you might notice he does something quite strange. During his run in Wonderland Grove he rolls through the door somehow, and as you can see with this gif it is practically impossible. https://gfycat.com/GlitteringDismalLamb

Now, I figured this out on accident the first time playing the Egg Hunt, but I don't know if Zenkoina figured it out first so the first person to figure it out argument is debatable. Anyways, the way it works is that first you need to eat a shrinking cupcake, followed by resetting. https://gfycat.com/BleakAmpleIsopod

And there you have it! With that in mind, you can now go through the door easily! https://gfycat.com/ShadowyBlissfulBoilweevil

But there's one problem that we have, you can't roll while holding an item, the item being the berry. Now, you might think that's no problem, but in order to go through the door you need to roll as shown in the previous gif. https://gfycat.com/ValuableDirectApatosaur

Now, there are four ways to go through the door successfully with the berry. The first way is the way Zenkoina did it. Now, I was unsuccessful when it came to trying to do Zenkoina's way of getting the berry in so you'll just have to watch the video for yourself. Now I came up with three more ways. The first one was diving into the door as that is possible, but I was only able to pull it off once successfully. Of course, once found out that way will obviously be the best way, but we'll just have to wait. Now the second one I came up with was the first one. When you bump into a wall with an item, the item tends to bounce around. With that in mind, if you bump into the wall near the door there's a chance of the berry going through the door. https://gfycat.com/ImperturbablePleasedCricket

Now the last way imo is the best way to get the berry through the door. When you roll, you can pick up an item while doing so as shown in this gif. https://gfycat.com/EnlightenedWeeklyDragon

So, what you have to do is place the berry beside the door (not directly in front, though.) Then, roll and pick up the berry. It might take a few tries, but it will eventually work. https://gfycat.com/UnfoldedInsistentHamadryas

There you have it. Done successfully, this should make your run faster. (and yes, it does work on the small house.) https://gfycat.com/LiveBiodegradableFruitbat