Card Trivia:Firewall Dragon


 * This monster is likely named after firewall, a network security system in computing that monitors and controls the incoming and outgoing network traffic based on predetermined security rules.


 * This card is the first Link 4 monster to be released.


 * This card has a downgraded form, the Link 2 "Proxy Dragon".


 * This monster and "Decode Talker" are the first ace monsters of a spin-off protagonist whose Type is neither Dragon nor Warrior, thus breaking the pattern of the spin-off protagonists' ace monsters.
 * It is also the first time a protagonist uses a newly created Type (in this case, the Cyverse-Type).
 * This card eventually replacing the 2300 ATK "Decode Talker" as Yusaku's ace monster also mirrors Yusei Fudo's "Stardust Dragon", who eventually replaced the 2300 ATK "Junk Warrior".