Sylveon's Guide to Ultra Wormhole Running
First, if you haven't already, go to the Gamefreak Studio in Heahea City (2F of the building to the right of the Dimensional Research Lab). Talk to the Aether Foundation person in the lower right corner of the room to switch to Circle Pad controls, which is much easier than motion controls. When you've done that, go to the wormhole. Collect as many rings as possible in the beginning, and avoid blue balls and most wormholes in the beginning. Try to only enter two or three ring or white wormholes. Accumulate as much speed as possible before the rings become less common. Good luck, bring a lot of Ultra Balls, Quick Balls, Max Potions, Full Heals, and a False Swiper in case of a legendary.
Sylveon's Guide to Mantine Surf
Go to the top of a wave, and right before you jump, zoom back down the wave. Do this until you have orange wind around you. Then jump off a wave. Perform some tricks (do 4 tricks in a row to get Magikarp Splash trick) and land perfectly. Do this as much as possible, and avoid Tentacool, Sharpedo, and Wailmer and Wailord (once you do the Master Rank) Repeat to get many points! I got 20,000 points this way.
Hope you do good!