Yugi: Right next to you
Even then, this card can be extremely useful in Decks like Killer Tune (YGOrganization Translation), as it can discard itself to search for any Level 3 or Lower Fiend Tuner from your Deck, but it locks you into Fusion and Synchro Monsters for the rest of the turn
If you want to stick to that style, they can be a little trickier to upgrade, but its worth it for the pure artistry and theming on offer

Fabled Fire King Firewall Fishborg Flamvell Floowandereeze Flower Cardian Fluffal, Frightfur, Edge Imp Forbidden Fortune Lady Fossil Frog Fur Hire Fusion Fusion Monster G Gadget Gagaga Gaia the Fierce Knight Galaxy, Galaxy-Eyes Gate Guardian Geargia Gem-Knight Generaider Genex Ghostrick Ghoti Gimmick Puppet Gishki, Aquamirror Gladiator Beast Goblin g goblin rider tentative G Gogogo Gold Pride Golden Lord, Eldlich, Eldlixir Gorgonic Gouki Gravekeeper Guardian Guardragon Gunkan Suship Gusto H Harpie Hazy Flame h heart tentative H Hecatoncheires Herald Heraldic Beast HERO Heroic Challenger, Heroic Champion Hieratic Dragon, Hieratic Seal Holy confectioner tentative Horus tentative I Ice Barrier Icejade Igknight Impcantation Infernity Infernoid, Void Infinitrack Invoked Inzektor Iron Chain J Jinzo Junk Jurrac K Kaiju k kaimetu tentative K Karakuri Kashtira k kenran tentative K Killer Tune Koa'ki Meiru Kozmo Krawler Kuriboh L Labyrinth Wall Lady of Lament Laval Libromancer Lightray Lightsworn Link Monster Lunalight LV, Level Up

Where To Find The Tanoby Key Puzzle To find the Tanoby Key Puzzle, youll first need to beat the game and embark on the postgame quests on the Sevii Islands