There is no entry fee for the Bug-Catching Contest. Anyone may enter once per day on the days which the contest is held.
To compete, trainers must catch the single best Bug-type Pokémon they can find. To do this, trainers are given 20 Park Balls and allowed use of a single Pokémon of their party. The rest of a trainer's Pokémon and any items they may have remain with the contest officials until the competition is over.
Any Pokémon caught will be recorded in the Pokédex, but only one Pokémon can be kept to judge. The Pokémon that is judged may be kept after the competition.
Shinny Pokémon like Butterfree are a possible catch, as (although rarely) they can be found within.
The two factors that determine the score in the contest are the rarity of the Pokémon and its level. Other factors, even the alternate coloration do not affect the outcome.
- 1st: Sun Stone/Random evolutionary stone Post-National Dex
- 2nd: Everstone
- 3rd: Gold Berry
- Consolation prize: Berry
In The Bug Stops Here, Ash and Casey competed in the Bug-Catching Contest. During the competition, Casey caught a Weedle, and her Chikorita evolved into a Bayleef. Ash won the competition with a Beedrill, earning himself a Sun Stone. After the competition, he gave the Beedrill to Casey, since she loves Pokémon with yellow and black stripes.