411 REFERENCE · Wikibooks
Pokémon Trading Card Game/Supporter Cards
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Supporter Cards:
Supporter cards help give the play an extra bonus if meeting the right conditions. It can be something as simple as drawing 2 cards or slightly healing your Pokémon. However, you are supposed to only play one supporter card per turn and before you decide to attack.