While mass removal is a bit counterintuitive to your game plan, it's always nice to have one in the back pocket when the game isnt going your way
Zombies reward patience, recursion, and board presence in a way few tribes can
Here's the build you should aim for: Mewtwo ex x2 Drowzee x2 Hypno x2 Potion x2 X Speed x2 Poke Ball x2 Red Card x2 Professor's Research x2 Sabrina x2 Giovanni x2 Drowzee and Hypno can also hold up as decent fighters while you wait to draw Mewtwo ex, but honestly the key here, as with the other two decks, is delaying tactics to set up the Psydrive attack
See if you can play a 1-drop on turn one, a 2-drop on turn two, and so on
Some of you may have gotten your packs from the pre-release events, through draft, sealed, or other limited events
The first Mystery Dungeon games received decidedly mixed critic reviews, but still sold over 1.4 million copies in Japan alone