Megalo Cannon (Japanese: メガロキャノン Megalo Cannon) is the ninth Japanese expansion of cards from the BW Era of the Pokémon Trading Card Game.
Megalo Cannon features the debut of Genesect in the Pokémon Trading Card Game, as well as Team Plasma and their Pokémon and for the first time since their debut in Plasma Storm, cards designed to specifically counter Team Plasma. Along with the typical Pokémon and Trainer cards the set sports Pokémon-EX cards, Ace Spec cards, a Special Energy card, Full Art cards, and Shiny Secret cards, totaling 86 cards. The set was released on March 15th, 2013 in Japan accompanied by the Blastoise/Kyurem-EX Combo Deck.
In order to help defend against Team Plasma's onslaught, Unova champion Iris is present alongside Caitlin, a member of the Unova Elite Four. Five Pokémon-EX are included: Virizion-EX, Jirachi-EX, and Team Plasma's Genesect-EX, Dialga-EX, and Palkia-EX. Many of the Pokémon present are not from Generation V, but instead are Pokémon from older Generations, some of which not featured in the Card Game since the Diamond & Pearl Series.
Megalo Cannon is only the third set of the BW Era to feature Fossils, the first two being Red Collection and Dark Rush. Archen and Tirtouga are given their second cards, while Lileep is given its first printing as a Restored Pokémon. Plume Fossil and Cover Fossil are reprinted, and a new fossil Trainer card, Root Fossil Lileep is included in favor over the old Root Fossil in order to prevent confusion over how the card should work. The expansion also includes a new iteration of Technical Machines. Because Technical Machines in the Pokémon games now have unlimited uses, they are now present on Pokémon Tool cards, instead of being a separate Trainer card class discarded at the end of the turn.
A special promotional card was given to those who purchased a booster box of Megalo Cannon in stores. This promotional card was Porygon-Z, a reprint with new artwork of the same Pokémon in the expansion.