[trickroom]

OK, Garchomp and Arceus-Ground get wrecked by Kyogre easily. I rather be prepared to take full power Water Spouts than sacking something. Oh yeah Gastrodon stops Dialga decently. Ground-Arceus can stop it too but it gets wrecked by Kyogre.

Generally I need something to take on Specs Kyogre and is a Ground-type. Garchomp isn't coming in on Kyogre and is OHKOed by Zekrom and Electric Arceus. Switching back to Palkia and Ground Arceus just makes my team 99% identical to Jibaku's. Why should I change Gastrodon for Garchomp or Arceus-Ground can be a better question. Don't encourage me to use back Jibaku's team, I want something FRESH and new.

All of those Electric-type resists hate Zekrom's Choice Band Bolt Strike and they don't like paralysis minus Ferrothorn. Also, switching Gastrodon to Palkia makes me lose to Electric Arceus, Steel Arceus and even more vulnerable to Ghost Arceus. Switch in on Thunder and get paralysed? Not something my Dialga and Giratina-O will like to enjoy. Although they are both slow, I want to outspeed slow base 90s.

The Water-type resists aren't enough to me. All of them will falter against Specs Kyogre.
Next, Gastrodon can actually check other things besides Kyogre. Gastrodon beats Focus Sash Darkrai next turn after Kyogre breaks it's sash. Giratina-O can just Shadow Sneak it to death after Kyogre's Surf while capable of surviving a Dark Pulse. I find Scald's moderate burn rate to be pretty useful for spreading status and I tried Palkia over Gastrodon before. In the end, I favor Gastrodon more.

EDIT: Still updating the threat list.