To attack the Sailor Senshi
Bunbo was released when Zoisite removed the crystal from Ryo's body. He did, however, still retain his human mind and heart, and tried to attack Zoisite once more, completely shocking the villain and causing him to lose the Rainbow Crystal he had just acquired: it dropped directly into Sailor Mercury's open hands. Zoisite then used the Black Crystal to affect Bunbo's mind, causing him to grow in strength and size and become more aggressive.
Sailor Moon quickly attempted to use Moon Healing Escalation to turn Bunbo back into his human form, but he was too strong, and the attack failed. Bunbo began chasing the senshi, shooting large razor blades at them. Luna instructed Sailor Moon that in order to transform him, they would have to weaken the Youma's energy first. After pursuing the senshi for some time, Bunbo managed to corner them by felling a tree in their path.
Luckily, Sailor Mars and Sailor Jupiter suddenly arrived on the scene and used their Mars Fire Soul and Supreme Thunder attacks, managing to destroy Bunbo's primary weapons: two pairs of shears which were attached to his arms. Sailor Mercury then used Sabão Spray to confuse Bunbo, while Sailor Moon used Moon Tiara Action to weaken him. Sailor Moon was then able to use Moon Healing Escalation to cause Bunbo to transform back into Ryo.