P-Acorn

[SuperZambezi]

P-Acorns are earned if you catch Nabbit. Have you ever used a P-Acorn to get through a level easily?

I never used one. Takes the fun out the level! But it is fun to mess around with for a bit. Also, there are 10 levels that can be completely skipped with the help of the P-Acorn:

New Super Mario Bros. U - All Skippable P-Acorn Levels

 

[Vipsoccermaster]

I used a couple, for a little assistance, but never used it to complete a level fully. It's nice that they included the item for players having a hard time, though. And wow, it seems that it's pretty much the levels that contains a Warp Pipe to go down underground or underwater. Nintendo probably overlooked by not making the walls high enough in order for the levels to be skipped with that item. Plus, that makes it easy for clearing the course without any damage achievement for you to post to Miiverse.

 

[Yoshiman222]

I've used it many times before. (Never on first-time playthoughs, though)
I usually lose it in the beginning, though, because I don't like really skipping levels by this thing.

Some levels, it can be really fun in to use, though! (Like in Snake Block Tower, just don't use the Snake Blocks ;D)

 

[Wafflenator]

I only used the P-corn on word 9-2: Run for it, because it made it easier.

 

[Luma Party]

It works well for getting star coins.
Pretty much same thing as the P-Wing.

 

[SuperZambezi]

Nintendo probably overlooked by not making the walls high enough in order for the levels to be skipped with that item.

I'm pretty sure they did this on purpose.