Here's why:
* Quick Ball mechanics: The Quick Ball has a higher catch rate if thrown at the beginning of a battle. This means it has a higher chance of catching a Pokemon on the first turn, regardless of its stats or abilities.
* Escape mechanics: A Pokemon's chance to escape a Poke Ball is determined by several factors like its stats, level, and the Poke Ball's catch rate. However, the Quick Ball's bonus is applied before the escape chance is calculated.
Therefore, if a Quick Ball is thrown at the beginning of a battle, the Pokemon will not have the opportunity to escape.