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By using his Rinnegan, Momoshiki is able to fully absorb the bodies of his target by turning them into chakra-filled edibles, which are shaped like Chakra Fruit. When eaten, Momoshiki will transform into a demonic-like being, and will have access to all of the target's abilities. Momoshiki also uses this technique to absorb chakra and transform it into chakra pills to grant him immense power and temporary immortality, although he has to keep taking the pills to retain his enhanced abilities and immortality.
Trivia
When Momoshiki used this technique, his Rinnegan colour changed from red with black ripple pattern into black with red ripple pattern.