He's the Tsuchikage what else would you expect from him?
Exactly, and im shocked that some are suggesting that onoki used the 'light-weight rock technique' to carry the turtle island when:
1) A ninja actually states that onoki is 'carrying the entire turtle island'.
2) Onoki himself refers to the added stress to his back carrying the turtle island inhibts on him.
3) He did not state he was using the levitation jutsu on the turtle or the light-weight rock technique.
4) The tremor that occured on the land of lightnings coast when he dropped the island there, indicates its immense weight.
5) The fact that after carrying the turtle for so long he refers to the stress in his back.
ALL indications suggest that he did carry the entire island turtle.
p.s. If onoki did indeed make the turtle levitate, why would he guide the turtle from its belly, in the middle of it, would he not drag the turtle from its hand and head towards the land of lightning or push the turtle from its back directing it towards the land of lightning?
Onokis positiion and all these indications prove
onoki did indeed carry the entire island turtle (as the manga itself states) with his
raw strength and used no jutsu on the island turtle.