Michael Boateng and Hakeem Adelakun are the third and fourth people charged in connection with the investigation into an alleged international illegal betting syndicate.
Chann Sankaran and Krishna Sanjey Ganeshan were charged on November 28 and remain in custody.
More top news
The Hollywood actor died of complications from surgery.
Celebrities lined up to be photographed with the characters, who famously have antennas on their heads and TV screens on their stomachs.
The Olympic champion released a statement after a newspaper alleged his American coach may have broken anti-doping rules.