I like the hammer drop Justyke. It is a little different from the traditional Pokemon standing animation, but I think it's totally acceptable since Justyke's whole deal is being a hammer, and it has no moving parts so it's very static otherwise. Also as others mentioned there are some Pokemon like Mr. Mime that are doing much more than just bobbing. If I had to pick a WIP animation where the more mainstream one is better, that would be Voodoom. The basic arm-swinging Voodoom already looks awesome, whereas the one with the quivering fists is jarring and distracting.
EDIT: There are several Pokemon that are bouncing up and down in their static animations when they could have just been standing, like Igglybuff, Azurill, Volbeat, and Spoink. If Spoink--a pig that's a spring--is allowed to bounce, I see no reason why Justyke shouldn't be able to its hammer version of a bounce. I couldn't find any analogues to Voodoom's jittery fist shaking though.