In the anime, when this monster is summoned in Defense Position, it encloses itself behind its shield.
In episode 4, Jack Atlas uses this card during his Turbo Duel against Yusei Fudo. He Normal Summons this card in Defense Position. Later "Speed Warrior" (whose ATK was 1800 due to its own effect) attacks and destroys this card. This card's effect then activates, halving the ATK of "Junk Warrior" until the End Phase. On Yusei's End Phase, the effect of this card expires.
This card also appears in a flashback Jack has when he explains how "Spacegate" works.
In episode 29, Jack uses this card during his Ground Duel against Tetsu Trudge while the latter was a Shadow Drone and while the former had assistance from Carly Carmine (Jack couldn't use his right arm as it was still healing, so Carly supported Jack by drawing and holding his cards). He Normal Summons this card in Defense Position. On the final turn of the Duel, Jack tunes this card with "Dark Resonator" in order to Synchro Summon "Exploder Dragonwing".
In episode 30, this card is shown in a flashback Jack has when he realizes that he remembers being involved in a Shadow Duel before he passed out.
In episode 59, this card appears in a series of flashback Carly has when she remembers all of the great moments she had with Jack upon seeing Jack's determination at rescuing her. Remembering this allows Carly to regain her senses and choose the "Changing Destiny" option that would make the Duel continue instead of making the Duel end in her victory.
In episode 84, Jack uses this card during his Turbo Duel against the Fake Jack Atlas. After Jack activates "Assault Spirits" and equips it onto "Red Dragon Archfiend", he activates the effect of "Assault Spirits" to send this card from his hand to the Graveyard in order to increase the ATK of "Red Dragon Archfiend" by this card's ATK until the End Phase (making its ATK to 3300 due to the "Trust Guardian"-granted effect of "Red Dragon Archfiend" being used). Jack then activates the "Trust Guardian"-granted effect of "Red Dragon Archfiend" to reduce the ATK of his "Red Dragon Archfiend" by 400 at the end of the Damage Step and prevent its destruction, so only the fake's "Red Dragon Archfiend" is destroyed. On Jack's End Phase, the effect of "Assault Spirits" expires.