So it's kind of been a mystery for me mainly because most Bionicle sets had no fingers. The Toa Mata in set form (only Tahu, Lewa, and Pohatu) have 2 fingers on those original block hands, Onua has 3 on each hand and Gali and Kopaka hold weapons. Also in Bionicle The Game the Toa Mata and the Toa Nuva have 2 fingers, but in the Miramax films Matoran, Toa, and Turaga have 5, while the Toa Hordika, Keetongu, Roodaka and others have 4. In the movie I believe Teridax also had 5. Bionicle Heroes shows the Toa Inika and Piraka with 4 fingers. Hydraxon, Axonn, and Takanuva '08 in set form also have 4 fingers.
The Legend Reborn and most Glatorian sets (besides Fero and Malum) make it pretty clear that Glatorian and Agori have 4 fingers, but when the Stars were released, the ones from the MU (Tahu, Takanuva, Piraka, and Rahkshi) used the Glatorian hand.
My question is, is there a standard number of fingers per species? Or does it vary? Do all Matoran, Toa, and Turaga have the same number of fingers? Do all Glatorian and Agori have the same number of fingers? Do all Makuta have the same number of fingers? And so on and so forth will all the other species.
I'm hoping someone can enlighten me.