Hehe, yush, you're right ^-^ Though from what I know, kangaroos can tighten and relax their pouches, but it'd make little sense not to have it all tight when noone's in there :3 My only excuse is that in these drawings I slightly exaggerate the features of a distinct species, like the pouches for kangaroos - you're absolutely right though, thank you a lot for telling me, it's very much appreciated <3
(yush yush, only females .. they use it to nurse and carry their little joeys in there, males kiiiind of don't have a use for it X3 )