How do I beat Champion Lance in Pokemon Heart Gold?

Alright..for one...you have too many fire types, one is all you need. Lance's Gyarados can rip through fire types like you couldn't believe, not to mention your ground type. To beat Lance, you'll need an Electric type to take out Gyarados, Ice/Dragon type to take out his Dragonites, and a strong water type to take out Aerodactyl and Charizard. You can use your Red Gyarados to defeat Aerodactyl and Charizard, but you need to Lv. it up to @ least Lv.50, if you wanna take it out in one hit.For your Dragon/Ice type, chances are you've seen a Dratini/Dragonair, so you can either catch one in the Dragon's Den or get one off of GTS if your lucky. Ice types that would be good, Lapras, Weavile, or Jynx. I usually go for Pokemon that has the is the same type as the move that is super effective against your opponents. IF it's the same type it gets S.T.A.B. (Same type Attack Boost) so that seriously helps in winning. I hope this helps :).