The best replacement for slade is robin.

The best alternatives to slade are rated as following:
★★★★★  robin
★★★★  deathstroke
★★  raven
★★  quiet riot
★  arrow
★  brother blood
★  oliver
★  green arrow
  red x
  goldsmiths
  nightwing
  starfire

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

Other search terms related to slade and their ratings are:
★★★★★ gretchen
★★★ noddy holder
★ before gretchen
You have in mind a companion for slade and it is not yet here? Propose!



Google Trends

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slade
robin
deathstroke