Ash's Pikachu learns Volt Tackle.
As Team Rocket blasts off, James says in the Japanese version, "Our Egg plan was thwarted by an Egg Move!" The only way Pikachu can learn Volt Tackle in Generation III is through breeding, though Ash's Pikachu did not learn it through breeding and it is not an Egg Move in the traditional sense, which may be why it was removed in the dub.
May receives a Pokémon Egg from Christopher and Jeannie.
May's Munchlax learns Focus Punch and uses Solar Beam for the first time.