There are many hidden Xizzle beads around Miniopolis. here are the ones i found:
Urbainia- on the back wheel of the Junked schoolbus
Sim Quarter- I didnt find any
Glasstown-one of the openings @ the base of King Tower
Carnival- wheel on the train where the albino alligator is
*Bayou- tree stump, old tire outside dark tree, old tire on pathway
Moon Base Zeta- leftmost room in the far corner
*Graveyard-between the two arrows to escape the 'hidden graveyard' section
*you need to have completed mission 4, 'Bye Bye Bayou' to acess these beads