Baco Baco No Mi or the box box fruit.
Type: Paramecia
Operation: There are a lot of things I want to discuss about this fruit so bear with me, onegai.
The most understandable thing about this fruit is that the user can create boxes of any materials he can find. The box can be hollow for storage or not. Every inch of the box he makes has a force exerted outwards (like water exerts pressure on the walls of it's container). Getting into some abilities I can think of, comes -:
Pandora no Baco (Pandora's box) - Based on a myth. The user can trap all malice and evil of a person (who is willing to comply) into a box. When the box is opened again, only by the user or the person who got his malice "stolen", the stored evil would be enough to kill the person (not the user).
Tamatebaco - Again, based on Urashima Taro's legend. The user can store up to 10 years of his age into a box, which gives the user 10 more years of staying in his current age, kind of like a mini version of Sugar, but just for 10 years. After the box is opened, instantly, the user gains 10 years. This can elongate the age where the user is the strongest and most active.
Baco Baco Boxing (Box Box Boxing) - It's funny. The user can create a small box of air (which exerts force outwards). The user wears the "box"ing glove and significantly increases the power of the user's punches and blocks
Pixel world- The user turns a really small amount of area around him into pixels (including air) and is able to freely control them and swap them with each other. In close combat, this works like Law's room. However, it takes a lot of energy from the user, as he has to create a lot of small boxes.
I'd be open to suggestions. Thanks.