Devil Fruits

Devil Fruits can be bought at starter island for 250.000 Berries by talking to Monkey D. Garp, or found in trees each 30-60 minutes (despawning 30 mins after spawned), there are currently 9 fruits in-game being : Flame, Phoenix, Gravity, Smoke, Chop, Sand, Dark, Paw, and Magma.

Mera Mera no Mi (Flame-Flame)
(Used by Ace / Donut in One Piece)

Tori Tori No Mi (Bird : Pheonix)
(Used by Marco / Pineapple in One Piece)

Zushi Zushi no Mi (Gravity-Gravity)
(Used by Fujitora in One Piece)

Moku Moku no Mi (Smoke-Smoke)
(Used by Smoker / Lung Cancer Man in One Piece)

Bara Bara no Mi (Chop-Chop)
(Used by Buggy D. Clown / The Strongest Man in One Piece)

Suna Suna no Mi (Sand-Sand)
(Used by Crocodile in One Piece)

Yami Yami no Mi (Dark-Dark)
(Used by Blackbeard in One Piece)

Nikyu Nikyu no Mi (Paw-Paw)
(Used by Kuma in One Piece)

Magu Magu no Mi (Magma-Magma)
(Used by Akainu / Donut Maker in One Piece)

Gomu Gomu no Mi/Hito no Mi, Model: Nika(Rubber-Rubber)
(Used by Monkey D. Luffy in One Piece)