Lets see, me and my friend have been doing some Action Replay(Not with my lovely Bold Crescelia) and using a max IV code here are the results.
31/31/31/31/31/31 Impish Gilgar "Impetous and Silly"
31/31/31/31/31/31 Timid Celebi "A little quick Tempered"
31/31/31/31/31/31 Timid Manaphy "Thoroughly Cunning"
31/31/31/31/31/31 Modest Zapdos "Often Scatters things"
31/31/31/31/31/31 Hasty Chimchar "Often Scatters things"
31/31/31/31/31/31 Bold Suicune "Impetous and Silly"
Weird, the Timid Celebi and Manaphy with the same base stats have different traits, while the Hasty Chimchar and Modest Zapdos do. But my Suicune and Gilgar both have similiar traits, boosting Defense, and have the same characteristic. So it might be random in same IV pokes.