This is a Pokemon Team with the types Grass and Fire types. It contains:

Sunflora: Sunny Day, Solar Beam, Giga Drain and Synthesis.

Cradily: Solar Beam, Toxic, Ingrain and Synthesis.

Magmortar: Sunny Day, Solar Beam, Flamethrower and Psychic.

Infernape: Sunny Day, Solar Beam, Flamethrower and Thunder Punch.

Groudon: Solar Beam, EarthQuake, Fire Punch, Thunder Punch.

Meganium: Solar Beam, Swagger, Toxic and Synthesis.

As you can tell it's based off of Solar Beam which explains the title. Start with Groudon so they don't expect a Grass type team. Then just use attacks depending on your foe. :)