>>527967274
Basically springlock suits are designed to be functional both as costumes and as animatronics as needed, but the suit's mechanism got triggered by a drop of water and it went into animatronic mode with him still inside it, crushing every bone in his body and killing him. But then he came back via his soul possessing the suit.
TLDR: His body is a corpse trapped within an animatronic suit and spiritually he is the suit now.