A few of the Pokemon that you could use are a Goldeen with the lightningrod ability, you could get the Kricketot and evolve it (Technician and fury cutter isn't a bad combo for the start), Mightyena with Moxie is pretty good, Trubbish gets toxic spikes relatively early on so that could provide help with some poison, and if your Grotle has Curse on it, it could set up with that move and take a few of her mons out.