What are your suggested gym sweeper in general?
I can see these Pokemons still occupy the gyms for most of the times:
Blissey, snorlax, dragonite, gyarados,rhydon, vaporeon.
So what are your frequently used/suggested gym sweeper?
For me, I use these and only dodge charge moves:
Tyranitar B/SE
Dragonite DB/DC or DT/HC or Outrage
Exeggutor */SoB
Also, for low motivation, is alakazam useful as gym sweeper?
Fast quick moves are important for gym sweeper to dodge easily and hopefully can build energy reasonably quick.
Answers
Tyranitar B/C and B/SE
Dragonite DT/O and DB/DC
For Blisseys and fairies only:
Exeggutor C/SoB
Flareon FS/OH or FS/Ft
If almost the whole gym is weak to a certain type, I would use a few Pokemon of that type to sweep.
A gym with Blissey, Snorlax, Steelix, Muk, Lapras, Clefable isn't a problem for me. I take the opportunity to use my fire types which I hardly have a chance to use.
I would use Flareon FS/Ft as sweeper if I could, but too many defenders resist fire.
Against high motivation, a gym sweeper is a bad choice. But if you want one I'd pick dragonite. Bite is a "weak" move.
You are making a huge mistake not using machamp against Blissey, Chansey and Snorlax. Basically taking 3x time longer to take down the gym. Machamp is also good against Rhydon.
My current team would be:
Machamp
Articuno
Jolteon
Dragonite
For low motivation gym I prefer dragonite. Yes, Alakazam also works fine in this case.
On higher motivation rounds I would say
Machamp X2 or X3 (Snorlax and Blissey and Ttar and Rhydon can be dispatched quickly)
Dragonite X2, DT/OR (Anything Machamp doesn't solve)
Your choice of X2 or X1 Glass cannon (Gengar, Alakazam, whatever works)
Final motivation round:
B/C Ttar or DT/DC or DB/DC Dragonite (DC is key so there is no overkill like outrage), and in general any multi bar high DPS killer. SC/SB Gengar is a prime candidate too.
The only leveled up pokemon I ever use if I decide to fight a gym are machamps in order to take out the blissey or snorlax which is almost always in the first position. Usually those blissey/snorlaxes are powered up, remnants of the original gym system.
For everything else that may be in a gym, I usually just use unpowered legendaries in order to see their move animations
based on some of the lists I see some of you might have a far different definition of sweeper than others.
Sweeper = don't change and fight all 6. Sometimes done on 2nd round, definately done on 3rd round
Dragonite & now Mew2 are the best sweeper in game.
Raiko is probably next
The key idea in sweeping is it doesn't matter if you take extra damage (like there is an Ice in the mix for dragonite) you need to kill everything before it gets off a charge move. So it can't resist your attacks.