There must be a lost biblebook which explains why all marsupials went straight to Australia after Noahs Ark stranded. 'Bye Noah, thanks for saving us!' And none of them decided to stop somewhere halfway in Afghanistan or China.
Well then, except for the opossum and the shrew opossum which went to respectively North and South America, and some lazy marsupials which, crossing Indonesia, decided to take a break and simply stayed there.
And they thus spoke to them, saying: 'Ah, don't worry, we'll cach up later....'. But that's all explained in this lost Bible book: 1 Metatheria 2:7