"Mushroom Go"

To his embarrassment, the mushroom master could not capture a single mushroom during his trip to Australia, even in a zoo.

Oh I thought there must be an abundance of mushrooms in a zoo, just like kangaroos (at least they are alike by having two o in them). 

Have kangaroos eaten all of them, and the later formed a colourful world of white, black, brown, orange, red, yellow and green mushrooms inside these kangaroos' stomach?

Though no inside view, here is the non-extraordinary look of a kangaroo.

And of course, a koala too, who is paid to sleep and rest. That is a non-easy job.