How did the wallet end up on Cal when he got meteored to Alternia?

John gave it to WV.  Courtyard Droll then stole it from him and gave it to Bec Noir.  Bec Noir put it in Lil’ Cal.  After he entered the trolls’ universe he threw Lil’ Cal into an Aradiabot which then traveled back in time threw a Skaian portal and exploded.  Aradia then found it and that’s the last we’ve heard of the wallet.