Power Box
From Yb Timeline
History
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He and Sunset tried to go after Anubis, but they lost him and returned to the HQ. However, soon after Anubis returned, and PB felt he was ready to see the proof Anubis had that Summer had truly become evil, a so-called room of true identity that I'm sure will be brought up when stuff that was on NSider is filled in so this mention will be removed at that point I'll bet.
When the Phazon outbreak began on Star World, PB was particularly worried that he couldn't do anything against it. He went after a mutated oho jee that killed some Yoshi Clone scouts, but most of his attacks were useless. However, after some fighting and a few decent hits, the oho jee became so enraged it literally exploded. PB was then attacked by some mysterious assailants who distracted him while they hauled away the mutant oho jee corpse. These same assailants appeared later attacking the YB HQ, nearly destroying it in the process.
PB later traveled to Yoshi's Island to help fight a phazon-mutated Whacka. After it was weakened they followed it to find a large storage of phazon on the island underground; it was a Space Pirate base.