Guest Stars Dee Bradley Baker voices additional voices André Sogliuzzo voices Hakoda Richard McGonagle voices Bato Kevin Michael Richardson voices additional voices Daniel Samonas voices Teo Michael Dow voices Haru Kevin Michael Richardson voices Tyro René Auberjonois voices Mechanist Sterling Young voices Pipsqueak Wayne Duvall voices Warden Poon Nick Swoboda voices The Duke Mick Foley voices The Boulder Carlos Alazraqui voices additional voices Carlos Alazraqui voices Tho Carlos Alazraqui voices Due William Bassett voices Swampmoster Serena Williams voices Ming William Bassett voices Huu Barbara Goodson voices additional voices