The original manga and first series anime has this card as a Level 3 while the second series anime has it as a Level 1.
In the anime, this monster appears when someone gathered his five limbs in their hand. In that instant, it appears and attacks, destroying all the opponent's monsters with one blow and wiping out the opponent's Life Points with his attack.
When Yugi duels Seto Kaiba (either in Death-T's final match in the manga or the second series anime's first duel), Yugi manages to assemble five pieces of the "Forbidden One" (a feat that no duelist has ever accomplished prior to that duel) then attacks and destroys all of Kaiba's three copies of "Blue-Eyes White Dragon", winning the duel.
In episode 1, Yami Yugi uses this card during his Duel against Seto Kaiba. After seeing his hand, Yugi concludes that the pieces are the parts of Exodia and he could win if he could get all five pieces. On the final turn, Yugi draws "Exodia the Forbidden One", As Yugi now had all five pieces in his hand, he summons "Exodia" who destroys all three "Blue-Eyes White Dragons" and wins Yugi the Duel.
In episode 3, Weevil Underwood asked Yugi if he could look at his Exodia pieces. Yugi does so, but right after seeing the Exodia cards, Weevil throws Yugi's Exodia cards overboard to insure that Yugi can't use them to help him win his Duels in Duelist Kingdom. Despite Joey Wheeler jumping in to try and save the cards, he only recovers two pieces.
This card is also shown when a boy is shown trading cards with another boy while the ship was heading for Duelist Kingdom.
In episode 55, Seeker uses this card during his Duel against Joey. After Seeker got all five piece of Exodia into his hand, he won the Duel through an Automatic Win. After the Duel, Seeker revealed to Joey he had 3 complete sets of Exodia to insure him of his victories.
In episode 56, this card is shown in the Seeker's hand during his Duel against Yami Yugi. In the next episode, Yami Yugi activates "Lightforce Sword" to banish this card from the Rare Hunter's hand for three turns. This card remained banished until the Duel was over.
In the second above-mentioned episode, this card can be seen in Seeker's Deck when Yami Yugi searches it and finds out the cards are fake(in the dub, they were real, but were marked).
In episode 74, this card appears within a series of flashbacks that show Yugi's first two Battle City Duels.
In the first above-mentioned episode, this card is shown when Adrian arrives at where Exodia is sealed off and takes out the five Exodia pieces from his Deck.
In the first above-mentioned episode, this card is shown in a flashback Adrian has when he remembers Yubel telling him that his will is more immense than the gods and that not even Adrian himself can tear it down.
In episode 149, this card was shown in Adrian's hand during his Duel against Jesse Anderson while the latter was possessed by Yubel. Adrian activates the effect of "Ritual of the Ultimate Forbidden Lord" to return "Right Leg of the Forbidden One", "Left Leg of the Forbidden One", and "Left Arm of the Forbidden One" from his Graveyard to his Deck, discard "Exodia the Forbidden One" and this card, and Special Summon "Exodius the Ultimate Forbidden Lord". In the next episode, Adrian activates the last effect of "Fog Castle" to send the latter and all cards from his field and hand to the Graveyard and add this card, "Right Leg of the Forbidden One", "Left Arm of the Forbidden One", and "Exodia the Forbidden One" from his Graveyard to his hand. Adrian then activates "Break the Seal" and activates the latter's effect to add "Left Leg of the Forbidden One" from his Deck to his hand, but Jesse sends "Nightmare Shuffle" to the Graveyard in order to activate "Hand Destruction", which forces both players to send four cards in his hand to the Graveyard and draw four cards. Adrian was then forced to send the four Exodia pieces in his hand to the Graveyard and draw four cards while Jesse just draws one card as he had no cards in his hand. Adrian then activates "A Feather of the Phoenix" to take "Exodia the Forbidden One" from his Graveyard and place it on top of his Deck. Adrian planned to activate "Backup Soldier" on his next turn to get the three remaining Exodia pieces in his hand and gain an Automatic Win, but Jesse defeats him before that could happen.
In the first above-mentioned episode, this card appears in Adrian's thoughts, when he reminds himself that he killed Echo in order to release Exodia.