Ancient Katydids are cricket-like creatures that are yellow and purple in color. They have two long, black, curled-back antennas and for spindly legs.
Probably one of the weakest monsters in the game, Ancient Katydids have only 25 HP and one special attack, the jump attack, which is but a stronger physical attack. However, these monsters are also one of the first monsters you will meet and you won't be that strong at all at this stage so they may seem more difficult than they actually are.
World Map - Near Mechat Crash Site.