Rex took advantage of the one time in Pixieville where the Magic Pops stopped working and launched an invasion. He used the Dark Magic of the Staff to call forth his monster allies that the Pixies had defeated in the past. With the Staff, Rex captured Ninfea and threw Pixieville into chaos. Rex thought that as long as he had Shinobi's Staff, he would be be invincible. Realizing that, he decided to destroy the Tree of Life, despite Ninfea's pleading. However, after Lockette, Caramel, Martino, and Cherie recovered the Sacred Scepter, Rex's plan began to fail. The Pixies regained the power of their MagicPops and fought back. The Pixies defeated Rex's army and Rex took his last stand against Ninfea and the Sacred Scepter.
Out of pure anger, Rex unleashed the full power of the staff against Ninfea. In the end, Rex was overpowered by Ninfea and the Staff of Shinobi was destroyed.