The best replacement for koala is panda.

The best alternatives to koala are rated as following:
★★★★★  panda
★★★★  sloth
★★★  koala bear
★★★  kangaroo
★★★  scout
★★  codekit
★★  drop bear
★★  prepros
★★  fb_graph
★  wombat
★  koala

Your alternative for koala is not listed? Suggest!
Speaking about koala, one probably shouldn't forget about fireman.

Other search terms related to koala and their ratings are:
★★★★★ fireman
★★★ firefighter
You have in mind a companion for koala and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of koala in all years. Click on graph for more.
koala
panda
sloth