Wattaildragon
Level 6 LIGHT/Dragon Normal2500 ATK / 1000 DEF
Capable of indefinite flight. Attacks by wrapping its body with electricity and ramming into opponents.
IMPORTANT: Capturing the "Wattaildragon" is forbidden by the Ancient Rules and is a Level 6 offense, the minimum sentence for which is imprisonment for no less than 2500 heliocycles.
Wattberyx
Level 3 LIGHT/Thunder Tuner Effect300 ATK / 0 DEF
When this card inflicts Battle Damage to your opponent by a direct attack, discard 1 random card from your opponent's hand.
Wattbetta
Level 2 LIGHT/Thunder Tuner Effect100 ATK / 0 DEF
When this card inflicts Battle Damage to your opponent by a direct attack, your opponent discards 1 card of their choice.
Wattchimera
Level 6 LIGHT/Thunder Synchro Effect1400 ATK / 1200 DEF
1 "Watt" Tuner + 1 or more non-Tuner Thunder-Type monsters
This card can attack your opponent directly. When this card inflicts Battle Damage to your opponent by a direct attack, place 1 random card from your opponent's hand on top of their Deck.
Wattcobra
Level 4 LIGHT/Thunder Effect1000 ATK / 500 DEF
This card can attack your opponent directly. When this card inflicts Battle Damage to your opponent by a direct attack: Add 1 "Watt" monster from your Deck to your hand.
Wattdragonfly
Level 2 LIGHT/Thunder Effect900 ATK / 100 DEF
If this card is destroyed by your opponent's card (either by battle or by card effect), you can Special Summon 1 "Watt" monster from your Deck.
Wattfox
Level 2 LIGHT/Thunder Tuner Effect800 ATK / 100 DEF
If this card is destroyed by your opponent's card (either by battle or by card effect), your opponent cannot Special Summon a monster, or activate Spells, Traps, Spell/Trap effects, or Monster Card effects, for the rest of this turn.
Wattgiraffe
Level 4 LIGHT/Thunder Effect1200 ATK / 100 DEF
This card can attack your opponent directly. If this card inflicts battle damage to your opponent by a direct attack: Your opponent cannot activate cards or effects until the end of this turn.
Watthopper
Level 1 LIGHT/Thunder Effect0 ATK / 0 DEF
Your opponent cannot select another face-up "Watt" monster as an attack target, or target them with card effects.
Watthydra
Level 7 LIGHT/Thunder Synchro Effect1500 ATK / 1500 DEF
1 "Watt" Tuner + 1 or more non-Tuner Thunder-Type monsters
This card can attack your opponent directly. When this card inflicts Battle Damage to your opponent by a direct attack, choose 1 card in your Deck and remove it from play. Add that card to your hand during your 2nd Standby Phase after activating this effect.
Wattkid
Level 3 LIGHT/Thunder Normal1000 ATK / 500 DEF
A creature that electrocutes opponents with bolts of lightning.
Wattkinetic Puppeteer
Level 4 LIGHT/Psychic Effect1800 ATK / 0 DEF
(Quick Effect): You can send this card from your hand or field to the GY, then target 1 monster your opponent controls; move that target to another of their Main Monster Zones.
Wattkiwi
Level 3 LIGHT/Thunder Tuner Effect600 ATK / 100 DEF
"Watt" monsters you control cannot be destroyed by battle while they are attacking.
Wattkyuki
Level 8 LIGHT/Thunder Synchro Effect1600 ATK / 1700 DEF
1 "Watt" Tuner + 1+ non-Tuner Thunder monsters
This card can attack directly. When this card inflicts battle damage to your opponent by a direct attack: You can shuffle both 1 "Watt" Tuner from your GY and 1 face-up non-Tuner Thunder monster you control into the Deck, and if you do, Special Summon 1 "Watt" Synchro Monster from your Extra Deck, except "Wattkyuki". You can only use this effect of "Wattkyuki" once per turn.
Wattlemur
Level 2 LIGHT/Thunder Effect800 ATK / 100 DEF
If this card in its owner's possession is destroyed by your opponent's card (either by battle or by card effect): Your opponent cannot conduct their Battle Phase during their next turn.
Wattmole
Level 3 LIGHT/Thunder Effect0 ATK / 100 DEF
This card can attack twice during each Battle Phase. If this card attacks a face-down Defense Position monster, you can destroy that monster immediately with this card's effect without flipping it face-up or applying damage calculation.
Wattpheasant
Level 4 LIGHT/Thunder Effect1000 ATK / 800 DEF
This card can attack your opponent directly. When this card inflicts Battle Damage to your opponent by a direct attack, select 1 face-up monster on the field and remove it from play until the End Phase of this turn.
Wattsquirrel
Level 3 LIGHT/Thunder Effect700 ATK / 100 DEF
This card can attack twice during each Battle Phase. If this card battles, negate the effects of the monster it battled, after damage calculation (including in the Graveyard).
Wattsychic Fighter
Level 3 LIGHT/Psychic Effect1500 ATK / 300 DEF
When this card is Normal or Special Summoned: You can target 1 card in your opponent's Graveyard; place it on either the top or bottom of their Deck. You can only use this effect of "Wattsychic Fighter" once per turn.
Wattuna
Level 4 LIGHT/Thunder Tuner Effect800 ATK / 700 DEF
This card can attack directly. You can only use each of the following effects of "Wattuna" once per turn. At the end of the Damage Step, if your monster inflicts battle damage to your opponent: You can Special Summon this card from your hand. When this card inflicts battle damage to your opponent by a direct attack: You can Tribute this card on the field and 1 or more non-Tuner monsters from your hand and/or face-up field, and Special Summon 1 "Watt" Synchro Monster from your Extra Deck whose Level equals the total Levels of those Tributed monsters.
Wattwoodpecker
Level 3 LIGHT/Thunder Effect1000 ATK / 100 DEF
This card can attack twice during each Battle Phase. Any monster that battles with this card cannot change its battle position.