Found this overview somewhere else on the net. Somehow makes sense I think. Or is this complete bullocks?
HP - Loves to eat/Often dozes off/Often naps/Scatters things about/Likes to relax
Attack - 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 persistant/Good endurance/Good perseverance
Special Attack - Highly curious/Mischievous/Thouroughly 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
MY THEORY: In the stat you have the highest IV the game will pick out one of the five characters! That really makes sense!