Give Regigas Own Tempo or Oblivious or some shit as an HA. Alternatively have Slow Start not reset when recalled. Also give Regigigas Rest, Slack Off and/or Protect so it doesn't die immediately waiting out slow start.
Regirock gets Shore Up (probably Recover) because lore.
Regice gets Recover and Heatproof because it's supposed to be unmeltable or something.Actually give it poison point but it freezes to troll physical attackers
Registeel gets Recover (creative I know). New HA is either a Solid Rock or a fur coat expy; Registeel is supposed to be durable as shit. Alternatively analytic or something so it can try to be less passive.
