Mr Wike made the claim on Thursday at the campaign rally of the Peoples Democratic Party (PDP) in Eleme Area of the State.
Onnoghen is accused for allegedly omitting to declare his assets and illegally operating five domiciliary accounts in various foreign currencies.
The charges were filed by the Code of Conduct Bureau (CCB) on the orders of Abubakar Malami, the Attorney General of the Federation (AGF). Onnoghen is to be arraigned at the Code of Conduct Tribunal (CCT).
As the matter was called up at the CCT on Monday, the top jurist was absent, challenging the jurisdiction to try him. He was represented by over 40 Senior Advocates of Nigeria (SAN) and some lawyers.
Later a Federal High Court sitting in Abuja halted the arraignment of the jurist.
Naming the minister as the arrow head of the plot, Governor Wike said the meeting where the plot was hatch was held in Abuja.
“At that meeting in Abuja last Monday, Amaechi confessed that he is the person behind the illegal crisis facing the CJN,” Wike said in a statement signed by Simeon Nwakaudu.
“He (Amaechi) bragged that he will destroy the CJN the way he brought Former President Goodluck Jonathan down,” he added.