If I breed a 6IV Ditto with a 5IV Infernape, what are my chances of getting a 6IV Chimchar if one holds the Destiny Knot?
You will almost always get a 5iv Pokemon, unless it transfers the missing IV of infernape. And if you do transfer all perfect IVs, It is a 1/32 or about a 3.25% chance you will get a 6iv baby, because the destiny caries down 5ivs from either parent and the last iv slot is random, and you can get 0-31 ivs in one stat, so it's a 1/32 chance. (Because we count 0 and 1-31)