Battle Field is the most basic level in 2-Player mode. It only has three types of enemies, Dwarf Red Bulborbs, Sheargrubs and the Shearwigs that hide under marbles, and all layouts are very simple. These include three circular rooms connected by a long corridor, one large room with little alcoves that usually hold yellow marbles, and a donut-shaped cave.
Because of the simplicity of the level layouts and how easy it is to travel across and find yellow marbles, it is quite likely for a player to finish the course in about two minutes if playing for yellow marbles. Note that for the second mentioned layout, prefer the yellow marbles that are not clustered in alcoves, because it is more than likely that at least two of them have Shearwigs nesting underneath, making collecting them slower, and possibly dangerous with only a small number of Pikmin. Don't forget about the fast enemy glitch that can happen to the Shearwigs and cause Pikmin to be lost more quickly due to the shearwigs' speedy boost.
Strategies
This stage is best won by stealing marbles from the other player.