How to beat red?

In order to beat Red, train up a Pokéemon of each type to counter any Pokéemon he sends out especially a Ground-type Pokémon.

Another OpinionIn order to beat Red, make sure your Pokémon are around Level 80 and also make sure you have Pokémon with you that will counter Red's Pokémon. For his Pikachu, you can use a Ground-type Pokémon such as Marowak or Onix in order to take it down. For Venusaur, you can use a Flying-type Pokémon such as Pidgeot or Staraptor or a Fire-type Pokémon such as Charmander, Vulix or Growlithe. For Blastoise, you can use an Electric-type Pokémon like Raichu or Electabuzz. For Lapras, you can use an Electric-type Pokémon. For Snorlax, you can use a Fighting-type Pokémon such as Hitmonchan, Hitmonchan or Machamp.