So I suggest before you go up the stairs to the first battle, buy plenty of healing items and Revives, because you might need them, and they definitely come in handy.

Electric attacks should do the trick on everything except for Exeggutor. A fire Pokemon can take out Exeggutor easily.

If you have a Kadabra or a Pokemon with Psychic, it can easily wipe out all of Koga's Pokemon.

Hitmontop is a Hitmonlee/chan relative. It's the one where it spins on its head with three feet in the air.

You should have a strong water Pokemon that can take out all of Bruno's Pokemon. If not, a psychic like Kadabra can do.

Umbreon is the Eevee evolution that you can get if you level up Eevee at night (Espeon, the Psychic one, by leveling up Eevee during the day.) Use a powerful attack to knock out Umbreon.

Vileplume can be taken out with a fire move.

Murkrow is a crow Pokemon. One electric attack should knock it out quickly.

Gengar doesn't like Psychic.

Houndoom is a devilish looking fire dog. Use Hydro Pump or Surf.

Lance uses basically the same lineup as in Red, Blue, and Yellow, except for the fact that he has 2 Dragonites in place of his 2 Dragonairs. But that makes it even easier.

Gyarados - Electric attack.

Dragonite - part flying - Ice or electric attack.

Dragonite - Ice or electric attack.

Aerodactyl - Hydro Pump or Surf.

Charizard - Hydro Pump or Surf.

Dragonite - Ice attack.

Then you will watch the credits and see "The End."

However, this is not the end. There is more to do.

Now you can explore the world from Pokemon Red, Blue, and Yellow with Gold & Silver improvements...