In one level there is a bear who will ask you to get rid of 8 Frills
in koala costumes.  To do this you must:

1)  Go to bush rescue and buy an infrarang or xrang.

2)  When you buy the rangs, a target will appear on the screen.  Put
the target on the koalas that are not real (you will know they are not
real koalas by talking to them).

3)  This will cause the Frills to come out of the costumes.  Hit them
with the rangs to defeat them.