Not really. Floatzel has:
Let's break it down. So, Floatzel has 55 Defense and 50 SpD. To put that in perspective, MAGIKARP has 55 Defense. Here's some damage calculations
252+ SpA Choice Specs Accelgor Energy Ball vs. 4 HP / 252 SpD Floatzel: 318-376 (101.9 - 120.5%) -- guaranteed OHKO
252+ SpA Choice Specs Mesprit Psychic vs. 4 HP / 252 SpD Floatzel: 246-291 (78.8 - 93.2%) -- guaranteed 2HKO after Leftovers recovery
252 SpA Abomasnow Giga Drain vs. 4 HP / 252 SpD Floatzel: 230-272 (73.7 - 87.1%) -- guaranteed 2HKO after hail damage and Leftovers recovery
252 Atk Choice Band Skuntank Crunch vs. 4 HP / 252+ Def Floatzel: 160-190 (51.2 - 60.8%) -- 94.1% chance to 2HKO after Leftovers recovery
This Floatzel gets OHKO'd or 2HKO'd by everything in PU. And that's just PU! Also, if you want to run a bulky Floatzel, you should replace Torment/Roar for Scald, for the 30% burn chance, and your EVs to 252 HP/252 SpD/4 Def. This works much better as 252 HP always allows you to tank hits better than max split defenses.
Conclusion- This Floatzel will NEVER work in a competitive environment; only use it against friends.