Allow me to offer my two cents on the difficult missions of card 3.
The Throh one does indeed require good Prank luck (if you don't plan to spend any Jewels), and it is preferable to throw a Moves +5 in there. The team I used was Mega Aerodactyl, Gliscor, Toxicroak, and Mr. Mime (max/5/2/2), and it took me a bunch of tries just to get the luck I needed.
As for the MMY challenge, I did do it on the MMY stage and not Mewtwo EX, and I used a team of Mega Steelix, Darkrai, Genesect, and Palkia (all max) and ended up with 3 moves left on my first try, using Sleep Charm to provide ample opportunity to Mega Evolve Steelix before the block spam. (Steelix > Aero for blocks unless there are rocks as well; Steelix gets +100 damage per block erased while Aero only gets +50.) Palkia might be replaceable; I just wanted the utility of removing barriers because I only remembered before starting the stage that there were blocks and barriers.
The Throh one does indeed require good Prank luck (if you don't plan to spend any Jewels), and it is preferable to throw a Moves +5 in there. The team I used was Mega Aerodactyl, Gliscor, Toxicroak, and Mr. Mime (max/5/2/2), and it took me a bunch of tries just to get the luck I needed.
As for the MMY challenge, I did do it on the MMY stage and not Mewtwo EX, and I used a team of Mega Steelix, Darkrai, Genesect, and Palkia (all max) and ended up with 3 moves left on my first try, using Sleep Charm to provide ample opportunity to Mega Evolve Steelix before the block spam. (Steelix > Aero for blocks unless there are rocks as well; Steelix gets +100 damage per block erased while Aero only gets +50.) Palkia might be replaceable; I just wanted the utility of removing barriers because I only remembered before starting the stage that there were blocks and barriers.