Pirate monster development

By accident, Luo Lei traveled to the world of One Piece and had a monster cultivation system. As long as he had enough devil fruits, he could infinitely grow monsters from all over the world.
King Kong, Godzilla, King Ghidorah, Blood-eyed Maned Lion, Star Devourer, Barton, Leaf Rot......
Garp: Can anyone tell me why this stupid King Kong is armed with a domineering look?
Yellow ape: This big bird blows me to death with a wave of its wings. What is the use of my speed?
Warring States: Marlin...