The best replacement for rex is spinosaurus.

The best alternatives to rex are rated as following:
★★★★★  spinosaurus
★★★★  ed-e
★★★★  ray
★★★  active sky
★★★  donna
★★  triceratops
★★  mini rex
★★  cody
★★  ben 10
★  lou
★  cornish rex
★  deinosuchus
★  ftx
★  fex
★  dune
★  active sky next
★  carcharodontosaurus
★  un kasa
★  oliver
★  ben
★  oedipus the king
★  active sky 2012
★  ase
★  rex lex
★  devon rex
★  triceratops video
★  ed e
★  allosaurus
★  gex
★  elephant
★  zulu
★  dna
★  joey
  t rex
  rex2
  spino
  young miles
  rex
  ed-e fallout
  king kong
  giganotosaurus
  regina
  carnotaurus
  raptor
  ray mgs4
  metal gear ray
  velociraptor
  ben 10 games
  walter
  aye verb

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

Other search terms related to rex and their ratings are:
★★★★★ ase
★★★★ active sky
★ fs2004
★ ben 10
You have in mind a companion for rex and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of rex in all years. Click on graph for more.
rex
spinosaurus
ed-e