Weevil Underwood's Decks

Weevil uses an Insect Deck. His strategies rely on cards such as "Insect Barrier" or "Cocoon of Evolution" to block opposing attacks while preparing to Summon his strongest cards, "Great Moth", "Perfectly Ultimate Great Moth", and "Insect Queen". Compared to other Duelists, Weevil uses few Magic and Trap Cards, the ones he does use act to protect his insects or allowing him to swarm the field with them.

Anime

Duelist Kingdom

Record
Opponent(s)	Episode(s)	Outcome(s)
Mako Tsunami	2	Win
Rex Raptor	2	Win
Yugi Muto	4-5	Lose

During Duelist Kingdom, Weevil's Deck focused on evolving "Larvae Moth" with "Cocoon of Evolution" and using Equip Magic Cards to power up his weaker Insects.

Battle City

Record
Opponent(s)	Episode(s)	Outcome(s)
Unknown Duelist	63	Win
Joey Wheeler	63-64	Lose

During Battle City, Weevil utilized "Insect Barrier", "Parasite Paracide" and "Reckless Parasite" to prevent opposing monsters from attacking, having arranged for "Parasite Paracide" to be slipped into Joey's Deck without his knowledge so he could use it against him. He further focused on his new ace card, "Insect Queen". Oddly, while Seeker was looking up duelist's rarest cards, "Great Moth" was listed despite Weevil's rarest card being "Insect Queen".

Waking the Dragons

Record
Opponent(s)	Episode(s)	Outcome(s)
Gurimo	145	Lose (with Rex Raptor)
Yami Yugi	160-162	Lose

When Weevil joined Dartz, he was given "The Seal of Orichalcos" and access to almost every card ever made. He used his strategy of turning his opponent's monsters into Insects to defend with "Insect Barrier", this time using "DNA Surgery". He also uses some burn cards, and cards that further exploit his strategy of turning his opponent's monsters into Insects.

Grand Championship

Record
Opponent(s)	Episode(s)	Outcome(s)
Zigfried von Schroeder	189	Lose (with Rex Raptor)
Rex Raptor	224	Not shown

Weevil was only seen Dueling once, attempting to infiltrate the Grand Championship but getting thrown out when he and Rex lost to Zigfried von Schroeder.

Video games

Duel Monsters

In Yu-Gi-Oh! Duel Monsters, Insector Haga appears as an opponent in the Forest area of the Duelist Kingdom island. True to his character, Haga uses many of the Insect cards of the game (including many used by Haga in the manga), fortified by Forest-themed cards.

Duelists of the Roses

Weevil's plays an Insect Deck. Among his strategies, he equips "Petit Moth" with "Cocoon of Evolution" to evolve it to the stages "Pupa of Moth", "Larva of Moth", "Great Moth" and "Perfectly Ultimate Great Moth". To ensure that his ultimate monster can come alive, he keeps his Deck Master next to it in order to build up defenses.

Dark Duel Stories (Duel Monsters III: Tri-Holy God Advent)

In Yu-Gi-Oh! Dark Duel Stories, Weevil appears as an opponent in Battle City, as a part of the second tier of duelists. True to his character, uses an Insect deck with his new Insect Queen as his strongest card. Various monsters he used in Duelist Kingdom also return. His signature card is shown to be Javelin Beetle, despite him not using it in the game.

Duel Monsters 4: Battle of Great Duelist

In Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist, Insector Haga appears as a part of the first tier of duelists. Insect Queen is once again the strongest card in his Insect deck, however, he now has more cards from Battle City, as well as Duelist Kingdom. His signature card is shown to be Javelin Beetle again, although it once again isn't used.