Evolve Machoke by leveling up at Level 40, or by using a Link Cable item.
Because Pokémon Liquid Crystal runs on a modified FireRed engine, traditional trade evolutions have been reworked. You no longer need a physical trading partner to complete your Pokédex. Trade Evolutions Replaced by Leveling or Items pokemon liquid crystal pokedex
Several Pokémon that normally require trading now evolve simply by reaching a specific level: Evolves at Level 40. Machoke to Machamp: Evolves at Level 40. Graveler to Golem: Evolves at Level 40. Haunter to Gengar: Evolves at Level 40. Item-Based Trade Evolutions Evolve Machoke by leveling up at Level 40,
The game divides its captures across three distinct regions, offering massive depth to your journey. Johto Pokédex Trade Evolutions Replaced by Leveling or Items Several
For those looking for a comprehensive breakdown, these resources are highly regarded in the ROM hacking community: Pokémon Liquid Crystal Pokédex Guide (Scribd)
Many trade-evolutions now trigger via specific items. For example, using a Moon Stone on Haunter evolves it into Gengar.
Use Headbutt on trees to find hidden Pineco, Heracross, and Aipom. Use Sweet Scent in tall grass to trigger instant battles when hunting low-encounter-rate specimens.