Trigun (1998)

Trigun takes place in the distant future on a desert planet. Vash the Stampede is a gunfighter with a legend so ruthless he has a $60,000,000,000 bounty on his head. Entire towns evacuate at the rumor of his arrival. But the real Vash the Stampede, the enigmatic and conflicted lead character, is more heroic, even though he usually acts like a complete idiot.