- This card appears in the artwork of "Three of a Kind" and "Cyber Network".
- This card's ATK and DEF are each 1000 points lower than those of "Cyber Dragon".
- This card is likely a successor to "Cyber Dragon Core", based on the similarity of the surrounding area depicted in the artwork of both cards.
- This card was created as a replacement for "Cyber Dragon" back when it used to be Limited to 1 copy per deck, because not being able to have 3 copies of it made it impossible to Fusion Summon "Cyber Twin Dragon" or "Cyber End Dragon" in Advanced format.
- This monster appears to be a prototype for "Cyber Dragon", hence the name "Proto-Cyber Dragon".