Steelix
I have a 100% Steelix with Dragon Tail and Heavy Slam, and I've been trying to decide if there's any point in powering him up. I'm level 33, but the Steelix was hatched during the Easter event, so he's just level 20. Blue gyms never last more than an hour around here, so shaving is a non-issue, and my main concern is trying to hold a few gyms long enough to collect from 4 or 5 of them. I've only ever seen one Chansey (Level 13, 35.6% IVs) so Blissey is not an option, and I usually just poke one of my random Vaporeons in for the few minutes before they get kicked out. Might Steelix do any better? I've never fought against one to know how they fare. Maybe even just the novelty factor could slow people down enough to give me an extra minute or two?
Answers
Unfortunately, I've only ever gotten 4 Onix, and 3 of those were from eggs, so if I don't buddy him I probably won't get any more candy for months, until I happen to hatch another one from an egg.
I've been walking with my one Chansey, on the off chance I ever find one worth evolving. Maybe I'll switch to the Steelix if I reach 60 or so Chansey candy.
That could work well in some areas, but even at level 20, his 1393 CP is actually a bit strong for prestiging around here. The rare time I find a gym that's already blue, the only Dragonites I ever see always have a 2400ish Vaporeon or two below them, and I always try to get the full 1000 points. Maybe I'll try it anyway some time, though, to see how he does.
Steelix is better than Vaporeon with this formula, but the formula doesn't count that Steelix has SO MANY weaknesses, it only counts the base stats and IVs:
sqrt(ATK)+DEF*0.75+STA
Steelix 0%: 411.916
Steelix 100%: 438.767
Vaporeon 0%: 407.068
Vaporeon 100%: 433.832
Steelix is better than a Vaporeon with a same IV distribution.