What is a little cup?

Question

I've been hearing the term "little cup" for a while. What is it?

Answer 1

In short, "Little Cup" is generally a basic pokemon that has an evolution and is not to powerful:

MC: Middle Cup, A tier exclusively for Middle evolved Pokemon such as Charmeleon, and Metapod.
LC: Little Cup, A tier exclusively for First form Pokemon such as Bulbasaur and Riolu.

Note: Some Middle and First form Pokemon are not allowed in MC and LC because they are too strong, such as in the case of Porygon-2 and Scyther.

Source: http://pokemondb.net/pokebase/meta/9797/abbreviation-solution

Answer 2

Little cup is a tier where you can only use pokemon that have never evolved, and can't evolve. Examples: Eevee, Poliwag, Poochyena