Pokémon breeding/Games/How to breed/Inheriting stats/Generation III

In, , exactly three of the baby's IVs are inherited from its parents (e.g. if one parent contributes two IVs, its mate will contribute the third). The other three are determined at random, though it is possible that some of these may coincide with those of its parents without actually being inherited.

In, the process is similar but more complicated. First, a random IV is passed from one of the parents to the baby. Afterwards, a random IV of any stat (other than HP) is passed from either parent to the baby; if it is the same stat (not necessarily the same IV value, depending on whether or not the same parent passed it on), it will override it. Finally, another random IV of any stat other than HP and Defense is passed from one of the parents to the baby; this IV will override any of the previous two if it is from the same stat. The remaining stats (a number ranging from 3 to 5) are determined at random, again with the possibility of one or more IVs coinciding with those of the parents.