Then you can come back and face him in a boss fight that's identical to your earlier, interrupted boss fight with him.
Now imagine a game that wasn't so dead set on artificially extending the amount of time you play it by ruining a major villain's storyline by stretching it into an endless grind. It's almost the opposite of the Spider-Man drone chase problem. Instead of failing to give us any real reason to do the bullshit, they merged it with a major story element and wound up ruining both. We can feel when our time is being wasted!
Pokemon's Repeated, Useless Contests
I'm sure you know the basics of your average Pokemon game. There are a bunch of critters sitting out in the grass, and you gotta catch 'em all and then train them into battle-hardened warrior beasts. It's a terrific formula and we're blessed to have this series in our lives, is what I'm trying to say. Sadly, though, this top-notch framework is often interrupted by Pokemon Contests, which seem to be less than pointless.
I mean, they might not be pointless, but the game never makes their meaning very clear. From what they explain, random audiences might vote on how cute your Pokemon is, or how cool it is, or how tough it is. Or they vote on how well it dances, or how awesome its costume is, or, bizarrely enough, how good it is at acting. Or they vote on how cool it looks when it's doing a move.
If this sounds like I'm just vomiting up a list of conditions, that's because I don't know why any of it is happening. There's no clear rewards system, and this is in a series that's FULL of clear and constantly reinforced rewards systems (win badges by beating gym leaders, obtain items after nabbing a certain number of Pokemon, so on and so forth). So if you ask me what the contest is, I'd say, "It's a circus-tent-looking building in town that you do your best to avoid."