From Bulbapedia, the community-driven Pokémon encyclopedia.
Trainer figures are a type of figure in the Pokémon Trading Figure Game. They are only used to determine if an attempt to use a Trainer card succeeds or fails. Due to Trainers being less important then the Pokémon figures, only 1 being needed for each player and having near identical bases, there are considerably less Trainer figures then Pokémon figures.
When a Trainer card is used, the Trainer is spun. If the result is success the Trainer card is used then placed face down, if the result is miss the players turn ends and Trainer card is kept face up and may be attempted again on a later turn.
All Trainer figures have a small red miss area with a probability of 8.3% and the rest is a large white success area with a probability of 91.6%. The rare Trainer figures have a blue ring around a large part of their bases; no figure or card was ever revealed to have a purpose for this.