Individual Values, or IVs, are inherent to the Pokémon, and affect its stats.
Checking a Pokémon's Individual Values
To check your Pokémon's Individual Values, open the Pokémon's Summary and check the yellow number corresponding to each stat.
Changing Individual Values
The ability to change a Pokémon's IVs is custom to Pokemon Planet and is only possible by using an IV Reset on it, which will re-randomize the Pokémon's Individual Values.
Impact on Stats
IVs boost stats according to the following formula:
At level 100, every IV equals 1 bonus stat point. This means that Pokémon can get a maximum of 31 bonus points per stat due to IVs.
A Pokémons IVs determine the Type of the move Hidden Power, which can be any Type except Normal and Fairy.