Greninja 7 Star Tera Raid - Solo Gastrodon Build (Pokémon Scarlet & Violet)

Gastrodon - Storm Drain Modest Nature - Shell Bell Max Special Attack and HP Clear Smog Earth Power Acid Armor 4th move can be whatever. I ended up getting it my first try solo without a true plan so it was a bit rough but anything can be better than helping hand if doing solo. Also, make sure you use 2 PP up or 1 PP Max on Earth Power. There may not be enough time to die but you can use a heal cheer midway through. I hesitated to Terastalize but I shouldn't have. Start with clear smog and use it the whenever they do double team afterward. Do one acid armor and then spam Earth Power. You should be fine health wise until mid-way through where you can heal once. If you are lucky, someone will use a water attack and boost your Special Attack. Earth Power isn't super hard hitting so it will take time but you should be safe the whole time. I find it interesting 3.5 years after this game's release, I am still doing events for it. I guess it worked out that I skipped them when they first came out as I as busier. Now I have a bunch of Pokémon already built up and ready to go.