To get a Gym Leader’s phone number, players must meet specific conditions and talk to the leaders at particular times and locations. These aren't always straightforward. For example, to get Misty’s number, you must first fix the Power Plant, then find her at Cerulean Cape on a date. To get Lt. Surge’s number, show him a Pikachu at the Power canada cell phone number data Plant during the morning. Each leader has unique requirements involving time of day, in-game events, and location.
Once a phone number is obtained, you can call the Gym Leader to schedule a rematch. These rematches feature significantly stronger Pokémon, providing an excellent challenge and a great way to earn experience and money. You can also use these battles to fill out your Pokédex, as some Gym Leaders may use Pokémon not normally seen elsewhere.
Beyond rematches, phone calls may lead to other perks. Some Gym Leaders may offer items or special comments that deepen the lore of the Johto and Kanto regions. It’s a fun way to stay engaged with the characters after their initial battles.
Collecting all Gym Leader numbers adds a layer of strategy and exploration. It’s more than just battling—it's about being in the right place at the right time. For dedicated trainers, this is a rewarding part of mastering Pokémon HeartGold.