Instructions
Travel to the National Park on Tuesday. The Bug Catching Contest is only available on Tuesday, Thursday and Saturday. However, Caterpie will only be available to catch on Tuesday.
Speak to the man in the red suit to begin the contest.
Select one of your Pokemon to enter the contest with. Choose a Pokemon with a high level and status-altering moves that cause other Pokemon to fall asleep or become paralyzed. These moves increase your chance of capturing Pokemon.
Walk around the National Park. As you walk, Pokemon will randomly fight you. Continue to walk around the park and start battles until a Caterpie fights you.
Use your Pokemon in battle to weaken Caterpie until its health bar, listed below its name, is red. Use your status-altering effects on it as well.
Use the competition Pokeballs to attempt to capture Caterpie. However, remember that you only have 20 balls to use.
Exit the National Park once Caterpie is caught to end the contest. You will get to keep the Caterpie that you catch once the contest is over.