Meltan
... that when the Pokémon Meltan was first revealed in Pokémon Go, many players thought it was a placeholder revealed by a glitch?
... that when the <a href="./Pokémon" id="mwAuc" rel="mw:WikiLink" title="Pokémon">Pokémon</a> <b id="mwAug"><a class="mw-redirect" href="./Meltan_and_Melmetal" id="mwAuk" rel="mw:WikiLink" title="Meltan and Melmetal">Meltan</a></b> was first revealed in <i id="mwAuo"><a href="./Pokémon_Go" id="mwAus" rel="mw:WikiLink" title="Pokémon Go">Pokémon Go</a></i>, many players thought it was a placeholder revealed by a glitch?