Which pokemon should I power up to be my Blissey killer?
I have several high-IV attackers waiting to be powered up but only have enough dust to power up one of them.
Answer here for the most accurate results: http://www.strawpoll.me/12512494
98% Ursaring (703 CP) - Counter/Hyper Beam
93% Espeon (1611 CP) - Zen Headbutt/Psychic
93% Flareon (1648 CP) - Fire Spin/Overheat
91% Exeggutor (940 CP) - Confusion/Seed Bomb
91% Rhydon (1121 CP) - Mud Slap/Earthquake
EDIT: Added contenders in the OP
Answers
Ursaring is extremely underwhelmng. I would 100% not waste stardust on a low level Ursaring to bring it up to level 30+. You can find Teddisuras so easily at high level regardless of Ivs. Rhydon is such a beast and that;s the best moveset for it but that's too low a level. Flareon w/ that moveset is a beast. Btw none of these are Blissy killers outside of Flareon?
I agree, however, alakazam has low HP, even dodging every moves, especially Blissey with DG, he still can't knock her out with his lifespan. Thus, it is common to use two monsters relay in battling with blissey.
In addition, since the six movesets of Blissey are not effective to steel type pokemons, scizor and magneton (with high attacking ability) can also be considered instead of just ursaring, machamp, dragonite, gyarados, flareon~
If dust isn't a problem, I'd probably power up the Ursaring and the Flareon. I think Counter/Hyper Beam is Ursaring's best moveset for Blissey since HyperBeam will get STAB and both it and Close Combat are 1 bar charge moves, but HyperBeam does more damage, even if it has a longer cooldown...
Ursaring is also more tanky so would be able to just attack without dodging if needed to worry less about timeout.
I'd also power up the Flareon if you need another attacker to clean up against Blissey...
I'd leave the rest as is.