Light didn't formally make an appearance in the Original Series, but his evolved form, Solar, appeared in BoBoiBoy: The Movie .
Light will be making his appearance in an unidentified upcoming episode.
- BoBoiBoy attained BoBoiBoy Solar, the supposed upgraded version of Light in BoBoiBoy: The Movie. It is also interesting to note that in the first episode of BoBoiBoy Galaxy, the readout of BoBoiBoy's skills by the Space Pirates showcased that he has seven elements (Earth, Lightning, Wind, Fire, Water, Leaf and Solar). It is quite possible while BoBoiBoy has his Solar form, he might have needed Light prior to use Solar, which explains why Thorn is not present during Galaxy.
- Another explanation would be when BoBoiBoy does the Hepta Split after being blinded by rage after Bora Ra destroys Ochobot, he had 'forgotten' two elements (the other being Thorn) until it is rediscovered and properly introduced.
- It's also possible that he might have lost access to these skills because he had been temporarily upgraded by Ochobot at the time and has not properly used his Elemental powers for several years (as it has been hinted that BoBoiBoy had been out of the superhero for a sum of time due to the world being at peace).
- An easier explanation is that BoBoiBoy Galaxy being a soft reboot and the elemental powers are reintroduced to new audiences who have not seen the original series.