His initial Deck is a "Hell/Infernal" Deck, consisting of powerful Fiend and DARK monsters, including "Chthonian" monsters. This Deck isn't seen at length but appears to have several control elements to it, "Chthonian Polymer" and "Chthonian Soldier" turning an opponent's powerful monsters against them, and "Mefist the Infernal General" and "Helpoemer" discarding cards from the opponent's hand.
Chazz is given rare "VWXYZ" cards by Vellian Crowler that he uses against Jaden for the duration of one episode. Though the Deck itself is only used once, all of the cards in it are shown again when Chazz starts combining separate Deck concepts in Seasons 2 and 3.
After all of his "Chthonian" cards were destroyed while stranded, he enters North Academy with a Deck made up of cards he had found on the grounds around the school, focusing on a One Turn Kill strategy. He defeated all fifty students at the Academy and became its new top Duelist.
After becoming the top-ranked student at North Academy by defeating all fifty other students, including their top-ranked student Czar, Chazz is gifted with the "Armed Dragon" Deck by North Academy's Chancellor Foster to use against Jaden Yuki in the "School Duel", an annual match between a nominated member of the student bodies of North Academy and Duel Academy.
Chancellor Foster forgets to take the "Armed Dragon" Deck back after Chazz opts to remain at Duel Academy (in the dub this line is changed to him bemoaning the fact that he didn't get a kiss from Ms. Dorothy). Despite this, Chazz keeps the cards and the issue is never brought up again.
It is around this time in the original version that he debuts his nickname "Manjoume Thunder." The name is a pun in Japanese, but was considered untranslatable. The chant is simply changed to "Chazz it Up" in the dub.
While Dueling against his brother Slade Princeton with the fate of Duel Academy on the line, Chazz is held down by a stipulation stating that he may only use monsters with less than 500 ATK. He journeys to a well deep in the forest and retrieves a myriad variety of cards thrown there by other students over the years who believed the cards too weak to ever be used.
Chazz constructs a 0 ATK Deck and develops several strategies that ultimately result in his victory.
Chazz goes to Atticus Rhodes, the brother of Alexis Rhodes to get his help in winning Alexis' affections. Atticus lends Chazz "love cards" which is put in a Deck with his Ojama monsters to create a Love Deck. Despite his efforts, he is defeated.
Chazz gathered many cards from Reject Well to build a Deck for a Duel against his brother Slade. He used monsters with 0 ATK, while the remaining monster cards were kept in his safe. When the "Dark Scorpions" were defeated and returned to their card form, Chazz added them to the cards from the well for safety's sake.
"Infernal White" and "White Veil" were given to Chazz by Sartorius and in his mind represented this servitude to the Society, so he ceased using them after his exodus from the group. He also begins calling himself "Manjoume White Thunder" in the Japanese version, signifying his devotion to Sartorius.
During the height of Chazz's time in the Society of Light, he is given a new Deck by Sartorius, focusing on a beatdown strategy with a "White Knight" theme.
He defeats professional Duelist Gelgo during the Genex Tournament using this Deck. He later Duels Jaden Yuki, who uses Chazz's Ojama cards to break Sartorius' mind control. Using the card "Cemetery Change", Chazz reclaims his Ojama monsters and also removes his white coat (calling himself "Manjoume Black Thunder" in the Japanese version). Despite this, he loses the Duel.
In the Dimension World arc, Chazz's Deck morphs once again, as he ceases his use of the "Armed Dragons", though a few are shown in the Japanese ending theme Sun, along with cards from his original "Chthonian" Deck. In these episodes, he uses an "Ojama"/Union Deck.
In the Darkness arc, Chazz gets two episodes devoted to the final steps in the development of his character, during which he utilizes another combination "Ojama"/"Armed Dragon" Deck, debuting new Spell and Trap support for both themes.