The best replacement for kangaroo is wallaby.

The best alternatives to kangaroo are rated as following:
★★★★★  wallaby
★★★  human
★★★  dingo
★★  kangaroo
★  snake
★  wombat
★  emu
★  anteater
★  cowhide
★  mascot
★  goose
★  koala
  ergotron
  wallaroo
  wallabee
  mr rogers

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

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



Google Trends

Scale is based on the average worldwide traffic of kangaroo in all years. Click on graph for more.
kangaroo
wallaby
human