>>34749887No, they're not. Legendary Pokemon are caught in the game and are designed to test your ability to catch Pokemon. These Pokemon all have legends that are well known in the Pokemon universe. For example, most people in Unova know that Cobalion, Terrakion, and Virizion saved Pokemon in the distant past. Or the mascot Legendary Pokemon, whose achievements and backgrounds are tantamount to the stories in each region.
Mythical Pokemon, on the other hand, are those unavailable in the game without an event, and are designed to reward players who continue to support the franchise. Many people stop playing the Pokemon games and move on to different ones, but those that still stick with Pokemon can get a Pokemon in return. Mythical Pokemon's stories and backgrounds aren't as well known; only a select few individuals know about their existence. Take Keldeo, for instance. Very few people know that Cobalion, Terrakion, and Virizion actually instructed an orphaned Pokemon on how to fight and survive during the fire. Very few people are aware of Keldeo's existence at all. That's why it is a Mythical Pokemon. Victini was hidden away in a basement by a rich man on Liberty Island, and only a select few people are aware of its existence. Genesect was a Pokemon restored from a fossil and modified by Team Plasma; only the Team Plasma scientists and N were aware of its existence.