The best replacement for majin buu is evil buu.

The best alternatives to majin buu are rated as following:
★★★★★  evil buu
★★★★★  kid buu
★★★  vegeta
★★★  gotenks
★★★  gohan
★★  broly
★★  vegito
★  majin vegeta
  janemba
  dabura
  vegetto

Your alternative for majin buu is not listed? Suggest!
Speaking about majin buu, one probably shouldn't forget about patrick star.

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



Google Trends

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majin buu
evil buu
kid buu