The greater the charge on cation, the greater the covalent character on the ionic bond. Explain how???

Larger the size of anion, greater is its polarizability thus greater will be the covalent nature of the bond .

As the charge on ion increases, the electrostatic attraction of the cation for the outer electrons of the onion also increases, with the result its ability for forming the covalent bond increases.

For the two ions of the same size and charge,one with pseudo noble gas configuration will be more polarizing than a cation with noble gas configuration.