If you control 2 or more face-up "Batteryman" monsters, you can Special Summon this card from your hand. Once per turn, you can Tribute 1 "Batteryman" monster, except this card, to select 1 card your opponent controls and return it to its owner's hand.
Leo, because he actually use the deck in Tag Force 5 and 6.
Well, not exactly he, since the deck was under Luna's possession, but the plot for that section of the story is that they accidentally swapped decks, which means the Batteryman deck that Luna runs is actually Leo's. It even has Power Tool Dragon in the Extra Deck.