This is the only episode in which Ash gives a Pokémon to another Trainer.
Ash fails to catch a Weedle for the second time as it's caught by Casey instead. However, she is later forced to release it under the contest rules.
Ash receiving a Sun Stone is a reference to the games, where the player gets a Sun Stone if they win the first place in the Bug-Catching Contest.
In the original, the rules stated that people over eighteen were not allowed to enter, while the in the dub, it was sixteen.
Casey's Chikorita evolves into a Bayleef.