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. :)