Isn't this called teen cup?
I'd prefer mix Charmeleon with Focus Punch to nab Chansey on the switch...
Probably better especially Combusken whose 60/60/60 defenses are essentially the same as Charmeleon's 58/58/65Combusken and Monferno can do the same sh*t.
Yeah dragon dance seems to be pretty bad actually. I mean sweepers outspeed majority of MC pokemon anyway so Swords Dance always seems better. On the note of boosting moves: I love bulk up an calm mind; max defense and HP on Duosion with Eviolite and a couple Calm minds it seems literally impossible to break. Cant hit it physically thanks to max physical bulk, eviolite and reocver, cant hit it specially with a few calm minds, eviolite and recover, cant hit it with seismic toss thanks to recover and cant toxic it with magic guard. The same roughly applys to gurduur too but it really misse the recovery move. Any other viable calm mind/ bulk up users that arent outclassed?
That's exactly why Reuniclus is so good in OU - if you don't have something that can beat it (which isn't much), and let it set up, it never dies.
Just wait for Sheer Force Croconaw. Crunch + Waterfall boosts? Score!