Originally Posted by Fat Crystal_
Ampharos is decent but not broken at all. As a sweeper, Electabuzz is better. Amphy does 19% max to Nidoqueen (because you should be using HPgrass for Quag) and rarely 2hkoes Chansey with Dpunch. You'll need to predict correctly every time and pretty much everything hits ampharos hard (or threatens it with status at least) so you won't get many opportunities to switch-in. If you don't predict grounds with hidden power you've basically let them switch-in for free, and if you mispredict against waters you could get paralysed or something. And you'll have to dynamicpunch chansey in the switch-in and pray for a hit, and firepunch grasses/magneton etc.
And defensively, what sleep talking electrics basically do is walling themselves... and giving free switch-in opportunities so some ground types (depends on coverage move, but you should run hpgrass anyway) I'd only use Ampharos as a support mon, probably with thunder reflect hpgrass twave/rest. It's good at it, but not broken.
Ampharos forces plays, just like Kingdra. If you are considering Amphy will always have HP Grass, then you can't switch Quag right away. And then, if it is going to give free switches, it's because you forego Quag for another Ground, or you're going with two grounds (forcing team building too much for a UU Pokémon).
Anyway, Quag can't be UU too. Pratically forces you to spamming HP Grass on every shit.