The best replacement for bionicle is hero factory.

The best alternatives to bionicle are rated as following:
★★★★★  hero factory
★★★★  transformers
★★★  lego
★★  bionicle
★  neo shifters
★  hero factory 4.0
  lego star wars

Your alternative for bionicle is not listed? Suggest!
Speaking about bionicle, one probably shouldn't forget about move along.

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



Google Trends

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bionicle
hero factory
transformers