Originally Posted by Fat El Scorcho
All of the Pokemon that are banned are REALLY unbalanced. Just look at their base stat totals. Mew can learn any TM, Jirachi has STAB Iron head with a 60% chance to flinch with great stats. I could go on. These pokemon would be on almost every competitive team and make the metagame very stale and make many pokemon unusable if the banned pokemon were allowed.
Shaymin, Jirachi, Darkrai, Deoxys are all overpowered. Mew is just unpredictable. The main reason they all are banned is because of the fact many people would have to hack to get them. Even though events are necessary to get Zoroark, it is not overpowered and everybody has had SO MANY oppurtunities to get it or Zorua