<P> Trainer cards perform various functions to affect the game: healing Pokémon, discarding energy from the opposing Pokémon, or retrieving cards from the discard pile are some key examples . Before the Diamond & Pearl expansion, all cards that were not Pokémon or Energy were considered Trainer cards . Trainers have since been subdivided into categories: Item cards directly affect the battling Pokémon, Stadium cards affect the entire field, and Supporters are like more powerful Items, only one of which can be played per turn . </P> <Table> <Tr> <Th> Color </Th> <Th> TCG type </Th> <Th> Type (s) </Th> </Tr> <Tr> <Td> Green </Td> <Td> Grass </Td> <Td> Bug, Grass </Td> </Tr> <Tr> <Td> Red </Td> <Td_colspan="2"> Fire </Td> </Tr> <Tr> <Td> Blue </Td> <Td> Water </Td> <Td> Water, Ice </Td> </Tr> <Tr> <Td> Yellow </Td> <Td> Lightning </Td> <Td> Electric </Td> </Tr> <Tr> <Td> Purple </Td> <Td> Psychic </Td> <Td> Psychic, Ghost, Poison </Td> </Tr> <Tr> <Td> Brown / Orange </Td> <Td> Fighting </Td> <Td> Fighting, Rock, Ground </Td> </Tr> <Tr> <Td> Black </Td> <Td> Darkness </Td> <Td> Dark </Td> </Tr> <Tr> <Td> Silver </Td> <Td> Metal </Td> <Td> Steel </Td> </Tr> <Tr> <Td> Pink </Td> <Td_colspan="2"> Fairy </Td> </Tr> <Tr> <Td> Gold </Td> <Td_colspan="2"> Dragon </Td> </Tr> <Tr> <Td> White </Td> <Td> Colorless </Td> <Td> Normal, Flying </Td> </Tr> </Table> <Tr> <Th> Color </Th> <Th> TCG type </Th> <Th> Type (s) </Th> </Tr> <Tr> <Td> Green </Td> <Td> Grass </Td> <Td> Bug, Grass </Td> </Tr>

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