Caterpie

Caterpie offers the quickest evolutionary path to Butterfree, requiring only 10,000 XP—a full 20% less than Weedle's path to Kakuna. With base stats of 195, including 45 HP and 35 Defense, it is a slower starter than the average Generation 1 Bug-type, but its line compensates with accurate Sleep Powder and 90 Base Power in Psychic moves post-evolution. This trade-off makes it a strategic choice for early-game status control, outperforming Weedle in long-term utility.