Try looking through the thread to see how others have handled her. Like above, try looking for a Dustox and mine for Light Clay on the beach. Keep Infernape, as it's speedy and can one-shot the Lapras and can deal heavy damage, but switch out Noibat for Swoobat and level it up. If you have Simple for an ability, lead with Electrode and soft reset until you can paralyze the Politoed with Discharge. Then switch into Swoobat and max out with Calm Mind. It has Ice Beam, so be careful and heal up when you need to. Also, if you have Water Absorb on Tympole, level it up to deal with Lanturn, maybe swap it out for Whiscash. Also, use that Quick Claw; hopefully you'll get lucky.
Best of luck, hope this somewhat helps.