Unlike the closely related Ponyta, Blitzle were not domesticated until the invention of the poke ball, and maintain a reputation for wildness to this day so severe that few humans will raise them. These few are exclusively pokemon trainers, for Blitzle are horribly uneconomical in the agricultural and transportation niches in which Ponyta have long excelled. This has been often ascribed to typing; fire pokemon have been owned by humans since man's best friend of Growlithe, while electric pokemon were much slower to be mastered. But the domestication of the electric rodent family makes this an untenable hypothesis, and the true reason Blitzle are so unruly owes more to the fact that their range overlaps entirely with those portions of the world which know thunderstorms.
For much as a human will reflexively cover their ears and run for cover in thunder, a Blitzle will leap over or charge through any enclosure in order to chase down the lightning's source. To them, lightning not only provides energy (as with most electric pokemon) but replenishes their electrified, white mane and stripes, which they use both to shock away parasites and attract mates with brilliant displays of white lightning.
To the people of Unova, the sound of racing Blitzle hooves has often been conflated with that of thunder, for the two are never far apart. And neither plugs nor pokeballs can constrain this primal urge; wise Blitzle trainers check the forecast constantly, so as to be prepared for when their pokemon will temporarily go mad. This compulsion is so severe that many Blitzle trainers will even try desperately to evade Unova-wide hurricanes, for the combination of fierce winds and thunder has driven many of these pokemon to an accidental release or an early, windswept grave.