Umm... U-Turn? That's part of it's ability.
A proper U-turn to punish switches once people stop being morons and leaving weak pokemon in on First Impression.
They trigger at the same time according to the research thread.
It can use them. I think its ideal set is a bit different from the OPs, though:
Not really. Being locked into his priority moves (especially first impression) is very easy to take advantage of, life orb at least ensures you can do respectable damage without being locked into your moves. LO orb also has the added bonus of potentially knocking yourself into emergency exit range, meaning if Golisopod is at 60% or less then it gets switch initiative on any of its attacks - for example the opponent sends out Skarmory to take the first impression only for you to immediately switch out to your Magnezone or Tapu Koko (or whatever).
Spikes Golis isn't all that great imo. Sure its powerful priority moves can force switches on the right opponents, but it's very unreliable at it due to emergency exit. Yes it would be amazing if Golis could use a move before it's forced out and make spikes a great set, but unfortunately it doesn't work this way. If the opponent brings your Golis down below 50% then your spikes user is unable to set spikes on that turn, something almost every other viable spiker can at least do, therefore it sucks :/
I really like this set but I'm still debating between Life Orb or Assault Vest (kinda like Conkeldur) and running Leech Life rather than Liquidation. 3 priority attacks and Leech Life for longevity. It's a shame that Pheromosa has slowed the discussion on a lot of these threads (as most of the mons heavily analized are those that can do something in a meta where she exists) because I would have loved more input on this set, as revenge killing or bulky assault vest user seem like his two possible roles.
so far I have found its a great way to bring in frail pokes like gengar and alakazam on pokemon that would otherwise ko them on the switch (its really usefull in ubers to trap with mega gengar)
I haven't used Golisopod much so it's not like im in any position to say what the best set is, but idk that set really doesn't seem optimal to me. Do you have any replays of this set in action? idk being locked into any of it's moves seems like such a risk for a Pokemon like this, like if you're locked into first impression (and potentially aqua jet) then you're setup fodder, if you're locked into liquidation or spikes the opponent has a much easier time forcing you out (of course you get switch initiative regardless, but with life orb you can at least threaten them with a powerful hit before you're forced out, and this could potentially prevent them from coming in in the first place. if you're locked into liquidation then for example alakazam has no fear of coming in and getting off a powerful hit, but with life orb sucker punch or aqua jet you can prevent this. Oh, did i mention it's incredibly risky as a spiker?). LO does unfortunately reduce Golisopod's defensive effectiveness by wearing itself down, something choice band can offset, but that's the only overall benefit i can see with a choice band set.
Heal then switch, and first impression is +2 :D
