不良小学生 is a Weiß Schwarz card from 超爆裂異次元メンコバトル ギガントシューター つかさ GST/SE22-22. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【ACT】 [REST 2 of your Characters] Choose 1 of your 《ギガント》 Character, during that turn, it gets +1500 Power.
This card was printed in Japanese only; the English text above is an unofficial community translation.