Saffron City

Saffron City is where its Gym Leader, Sabrina, resides.

Bosses
Abra - no move?

Gastly - Destiny Bond

Kadabra - Psycho Cut

Venomoth -

Slowpoke -

Mr. Mime -

Alakazam -

Mewtwo -

Strategy
There are a few Abras, Kadabras, Alakazams, One Haunter, Slowbros, Venomoths and Mr. Mimes, and Gastlys in the levels. Everything in this level has a weakness to ghost and dark type moves except Venomoth, You may want to bring a pokemon with moves specifically to defeat these foes. Charizard's Inferno works well on these.

For the first few waves at the top track, sleep is pretty much the only way to take them out without losing meowth. Especially hard is Kadabra, who seems to have both Light Screen and Barrier up.

The Ghost types all use destiny bond, so be prepared to sacrifice a pokemon for each one, unless you depend on poison or burning to kill them. Again, Charizard's Inferno helps. There is also a strategy where you quickly move the pokemon off the spot after it attacks, but before it perishes from the song.

No pokemon on this level seems to be affected by OHKO moves like Perish song or Horn Drill.

The real challenge is the Mewtwo at the end of the level.

The best strategy you can use is to let some of the pokemon on the lower track get meowth and bring it back, giving you more time to kill Mewtwo as he runs the whole track.

The way to defeat Mewtwo is to arrange a good Bug or Ghost type Pokémon and have it fight alongside a Snorlax equipped with Yawn. The Yawn will slow him down while the attacking Pokémon will slowly defeat Mewtwo.

Trivia
The talking Meowth is a reference to the anime series, where a talking Meowth would follow Jessie and James around and make trouble for Ash by attempting to steal his Pikachu.