All this is courtesy of my friend Denin and his Nintendo Power guide for Pokemon D/P. It seems that in Pokemon Diamond and Pearl there's a thing called a Characteristic. This characteristic is independant of natures and governs how fast a stat grows in the game. Perhaps this is the game telling us what IV is the Pokemon's highest, but this is not certain currently. It could even be a second nature-like thing, but there's NO drawback to characteristics. Here's a listing of all of the stats and what the game will say provided the stat will grow quickly. Stats Quickly Rise HP... :Loves to eat :Often dozes off :Often naps :Scatters things often :Likes to relax Attack... :P:Proud of its power :Likes to thrash about :A little quick-tempered :Likes to fight :Hot tempered Defense... :Sturdy body :Capable of taking hits :Highly persistent :Good endurance :Good perseverence Special Attack... :Highly curious :Mischeavious :Thoroughly cunning :Often lost in thought :Very finicky Special Defense... :Strong willed :Somewhat vain :Strongly defiant :Hates to lose :Somewhat stubborn Speed... :Likes to run :Alert to sounds :Impetuous and silly :Somewhat of a clown :Quick to flee Discuss, and any new information would be greatly appreciated.