Rod transmigrates to the world of One Piece, becoming a slave who was nearly sold at auction.
Fortunately, he awakens a nonhuman System. As long as he attracts attention from the outside world, he earns attention points, which unlock nonhuman transformations.
From then on, the world of One Piece is filled with countless powerful, arrogant monsters causing trouble.
Biochemical monsters, Godzilla, perfect beings, heroic spirits, Transformers, demons, dragons, demon gods...
He can even transform into the legendary immortals and Buddhas.
Celestial Dragons: The Titan standing tall between heaven and earth is the true god.
Hawk-Eye: This heroic spirit, a swordsman born from human history, is the greatest swordsman in the world.
Kaido: This perfect being that can transform into other creatures is the true King of Beasts.
Red-Hair: Compared with my clout, Rod's clout is what really matters.
This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.
Non-human transformation options for the protagonist, Pokémon Mewtwo, Ho-oh, Suicune, Entei, Raikou, Zapdos, Freezebird, Flamebird, Lugia, Groudon, Rayquaza, Darkrai, Dialga, Regigigas. Among the Digimon, BattleGreymon, SteelGaruru, Clown King, Sixwingmon, Emperordramon, Alphamon, Omegamon, etc.
I hope what you wrote is the first level and tenth level, otherwise it will collapse because the lifespan is wrong.