The best replacement for hedgehog is porcupine.

The best alternatives to hedgehog are rated as following:
★★★★★  porcupine
★★★★  fox
★★  groundhog
★★  hamster
★★  guinea pig
★★  chinchilla
★★  ferret
★  sugar glider
★  shadow the hedgehog
★  rat
★  sonic the hedgehog
★  woodchuck
★  bloody thorns
  chinchilla pet
  echidna
  bunny
  shrew
  sonic
  tenrec
  shadow the black hedgehog
  porcupine difference
  crash bandicoot
  bearded dragon
  silver the hedgehog

Your alternative for hedgehog is not listed? Suggest!
Speaking about hedgehog, one probably shouldn't forget about amy rose.

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



Google Trends

Scale is based on the average worldwide traffic of hedgehog in all years. Click on graph for more.
hedgehog
porcupine
fox