They seek to get stronger and craved it, they even went as far as to damage Gothitelle because they didn't get the power they wanted.
They have quite different characteristics, while Haxorus is very aggressive, narcissistic, and almost stupid, Hydreigon is alot smarter, and therefore ends up the one becoming more powerful at the end of the game, Haxorus is therefore also alot more competitive and wanted to hurt Gothitelle badly because she refused to give them their powers, ironically enough it was Haxorus fault that they lost their battle with Pikachu to prove that they were worthy a power-up.
Haxorus is fought at the climax of the game at Wish Park, where in the first sequence of the boss battle the player must defeat his minions in order to continue, the player faces the following Pokémon:
After this, the player faces Haxorus himself.
He can use the moves Dragon Breath, Head Charge, and Dragon Tail. He isn't hard but neither is he that easy.
Hydreigon is fought after the Haxorus battle in the Crag Area, he is harder than Haxorus, he has multiple elemental-breath moves that he can use.
Hydreigon can also be fought after-game in the colosseum, he is fought at the last stage of the colosseum and is one of the hardest fights at the colosseum.
- It is debatable if they really were Darkrai's minions, considering they more or less only were there because they wanted power
- The first part of the story is considered lighthearted, but after a while it starts getting more serious, and interestingly enough they become considered Comic Relief after that