From The Bakugan Wiki
GS is the first promotional Bakugan Battle Planet card set. These cards were given out at the American Bakugan GameStop event on June 1, 2019, and then later during a Canadian Toys R Us event on September 15, 2019.
These cards are Foil/Hex versions of existing Battle Brawlers cards except they are given the Bakugan Elite design where the artwork goes through the borders.
List of Cards in the first promotional Battle Planet card set
|Number||Image||Card Name||Card Type||Faction||Energy Cost||Paired BakuCores||Base Bakugan||B-Power||Damage||Rarity|
|1||Counter Pyrus||Flip Card||Aquos||0||N/A||N/A||N/A||N/A||PROMO|
|2||Prismatic Bolt||Action Card||Darkus||4||N/A||N/A||N/A||N/A||PROMO|
|3||Fire Boost||Action Card||Pyrus||2||N/A||N/A||N/A||N/A||PROMO|
|4||Ventus Titan Maxotaur Ultra (Battle Brawlers)||Evo Card||Ventus||4||N/A||Ventus Maxotaur Ultra (Battle Brawlers)||800||8||PROMO|
|5||Aquos Hyper Serpenteze Ultra (Battle Brawlers)||Evo Card||Aquos||5||N/A||Aquos Serpenteze Ultra (Battle Brawlers)||500||8||PROMO|