import requests
import shutil

res = requests.get('https://2ch.hk/b/catalog.json')

catalog = res.json()

thread = max([t['num'] for t in catalog['threads'] if t['subject'].startswith('ЛЕГЕНДАРНЫЙ ТРЕД ZASMOBOS')])

res = requests.get(f'https://2ch.hk/api/mobile/v2/after/b/{thread}/{thread}')

posts = res.json()['posts']

posts = [p for p in posts if p['op'] == 1 or p['num'] == thread]

for post in posts:
    files = post.get('files') or []
    for file in files:
        image_url = 'https://2ch.hk' + file['path']
        save_path = 'C:/zasmobos/' + file['name']
        res = requests.get(image_url, stream=True)
        with open(save_path, 'wb') as out_file:
            shutil.copyfileobj(res.raw, out_file)