Onix had formidable defenses, but his greatest weakness was his extreme vulnerability to Water-type moves.
"Poliwhirl, use Waterfall again!"
"Poli~ whirl~"
With the rainy weather boosting him, Poliwag unleashed his move with greater speed and power.
Onix had no time to react before Poliwhirl's Waterfall struck him, leaving him severely injured.
Although Onix was at a very high level, the type disadvantage left him utterly powerless to fight back.
"Poliwhirl, use Mind Reader, then follow up with Hypnosis!"
Zhang Cheng was ready to finish things up. Although Onix was badly injured, he still had some ability to resist.
The best way to catch this Onix was to put him to sleep first.
Onix also realized that things were going wrong and turned to flee from the cave.
But Poliwhirl had already finished using Mind Reader. A string of hypnotic sound waves followed, striking Onix just as he was about to escape.
After Hypnosis hit him, Onix struggled briefly before falling into a deep sleep.
Seeing that Hypnosis had worked, Zhang Cheng immediately threw the Poké Ball he had prepared beforehand.
The Poké Ball struck the sleeping Onix precisely. A beam of red light shot out and drew him inside.
Then the Poké Ball dropped to the ground and began shaking violently.
"One~ two~ three~"
Onix was successfully caught.
After catching Onix, Zhang Cheng wasted no more time and headed straight back to Yellow Sand Town.
Onix's injuries were rather serious, so Zhang Cheng planned to hand him over to the League and complete the mission as soon as possible. If anything happened to Onix, he would suffer a huge loss.
Zhang Cheng arrived at the Mission Center and handed Onix's Poké Ball to a staff member, completing the mission.
After completing the mission, Zhang Cheng received 250,000 Pokémon Coins.
This