Clodsire solos the Primarina raid easily
Clodsire the goat. It's actually fairly simple. You take Clodsire to Montenevera. Hyper train it's HP, Attack and Special Defense. Give it 26 Protein, 26 Zinc and 1 HP UP. Teach it the moves Poison jab, Curse and Amnesia. Make sure it has the ability Water Absorb. Give it a shell bell. A plus attack nature (Adamant or Brave are the best options). Go to Medali to get a poison tera type if you don't already have it and you're good to go.
The strategy is simple, you poison jab until you can terastalize. Do so and keep spamming Poison Jab until it nullifies all stats. Then use 1 amnesia, 4 curses (you can use an extra amnesia in between if you feel like it's doing enough damage with Psychic). After the buffs it's poison jab spamming until it dies. It doesn't tend to use nullify stats more than once.
Why is clodsire so good for this raid?
So the primarina has it's hidden ability which is called Liquid Voice. This ability turns all sound based moves into Water type. Crucially, what primarina wants to spam this raid is Sing. By making sing into a water type move, it triggers Clodsire's water absorb, healing us instead of putting us to sleep. The rest of it's moveset includes Hyper voice, which will also heal us instead, Psychic and Moonblast. The latter of which has the chance to reduce your special attack, which doesn't matter because you're targetting it with Physical moves. Also the use of amnesia means that the special defense drop from psychic is a lot less threatening.
Happy hunting gamers. Enjoy the free raid.