Regigigas gave the first impression of a humanoid artillery battery, but that was not actually the case. It was not that it could not use ranged attacks, but rather that close combat was its true specialty.
Under the effects of its Slow Start Ability, however, no matter how it fought, Regigigas was like an antiaircraft gun trying to shoot a mosquito. Turning clumsily, it could do nothing against the nimble Deoxys.
One was twice the other's height, but with Slow Start in effect, Deoxys in its Speed Forme moved more than three times as fast. On top of that, it could fly, giving it an aerial advantage and allowing it to circle Regigigas, running rings around it.
Most importantly, even in its Speed Forme, Deoxys's attacks were not merely harmless scratches. They still posed a certain threat to Regigigas.
Their clash also gave Giratina an opportunity to escape.
Perhaps Deoxys's harassment had annoyed it enough. Now that Deoxys had turned its attention to another Pokémon, Giratina showed no intention of joining Regigigas in a pincer attack. Instead, it turned and left without so much as a backward glance!
Normally, with Giratina gone, Ash and his companions had no further business here. They had no way of stopping the battle between Deoxys and Regigigas, either, so they were perfectly free to leave.
But seeing that Xia You had stayed, Ash remained as well.
After all, a battle between a Legendary Pokémon and a Mythical Pokémon was not something they could easily witness. Not only Ash, but Dawn and Brock did not want to miss such a spectacle either.
Only Mu Xuan chose not to stay. He said goodbye to them and set off in the direction Giratina had gone.
After all, he was a researcher, and studying the Distortion World was