>>42146990His body is made out of prey, anon. His gut churns that which he eats into more flesh on his bones just as yours and everyone else's does. If Lugia eats you, every nanometer of useful blood and bone and meat inside you will literally become part of his mind and body instead
and the rest of you will be shit out as waste. Though considering his almighty psychic power, I wouldn't rule out innate soul merging either; there may actually be some miniscule portion of your innermost consciousness that resides within him after this, like floating on your back in an endless sea.