>>50896879Blissey and Chansey can be easily overcome by any physical attacker, or easily defeated by keeping momentum and never giving them a chance to heal. BoltBeam Regieleki would be different. It would be stronger than Pheromosa, faster than Pheromosa, and bulkier than Pheromosa. With almost perfect coverage, the inability to answer defensively, and a speed stat so high that only priority and a handful of rare Pokemon are capable of outspeeding it.
There's no way it wouldn't be Ubers. Spectrier got its ass banned for far less. If Normal types were as good an as common as Ground types in the higher tiers, Spectrier would still probably be around since it'd have actual checks. Regieleki with BoltBeam coverage would have few real checks, and only 1 actual counter (Mamoswine).