What episode does drago evolve into helix drago?

Drago evolves into Helix Drago in the episode titled "The Ultimate Battle," which is the 48th episode of the anime series "Beyblade: Shogun Steel." During this episode, Drago undergoes a significant transformation to gain new powers and abilities, enabling it to face stronger opponents. This evolution is a pivotal moment in the series, marking the growth of both the character and the Beyblade itself.