By 1942, Bugs had become the number one star of "Merrie Melodies". The series was originally intended only for one-shot characters in films after several early attempts to introduce characters (Foxy, Goopy Geer, and Piggy) failed under Harman–Ising. By the mid-1930s, under Leon Schlesinger, "Merrie Melodies" started introducing newer characters. "Bugs Bunny Gets the Boid" (1942) shows a slight redesign of Bugs, with less-prominent front teeth and a rounder head. The character was reworked by Robert McKimson, then an animator in Clampett's unit. The redesign at first was only used in the films created by Clampett's unit, but in time it was taken up by the other directors, with Freleng and Frank Tashlin the first. For 1943's Tortoise Wins by a Hare, he created yet another version, with more slanted eyes, longer teeth and a much larger mouth. He used this version until 1949 (as did Art Davis for the one Bugs Bunny film he directed, "Bowery Bugs") when he started using the version he had designed for Clampett. Jones came up with his own slight modification, and the voice had slight variations between the units. Bugs also made cameos in Avery's final Warner Bros. cartoon, "Crazy Cruise".