Does Lagging Tail Sableye with 136 Speed go before or after Sableye with 137 Speed?
Obi, that was an excellent question.
OK, I've got two Sableyes with Stall. I named them Hasty and Sassy after their natures. They're both L.33.
Hasty's Speed: 51
Sassy's Speed: 36
Neither has a Lagging Tail: Sassy goes first.
Hasty has a Lagging Tail: Sassy goes first.
Sassy has a Lagging Tail: Hasty goes first.
Hasty has a Lagging Tail, Sassy has Full Incense: Sassy goes first.
Sassy has a Lagging Tail, Hasty has Full Incense: Sassy goes first.
The above tests were done with the move Knock Off. I then did the tests again with Shadow Sneak and obtained the same results.
So, it appears that Lagging Tail and Full Incense stack with Stall to make Sableye even slower.
Other miscellaneous tests:
A much faster Staraptor with Quick attack beats a Stall Sableye with Shadow Sneak (just making sure).
Ugh. Not only that, but new testing shows that I may have been mistaken about Stall being equal to Lagging Tail. I just had a Stall Sableye act before a slower Machop with Lagging Tail. I'll post another update soon...
EDIT: OK, here's the real skinny:
Lagging Tail and Full Incense are exactly the same. They both trump Stall, meaning that a Pokémon with Lagging Tail or Full Incense will always move
after a Pokémon with Stall as long as both use moves in the same priority bracket. Furthermore, Stall does not stack with either of these items, meaning that if a Pokémon with Stall holds one of these items, Stall is ignored. If two Pokémon have Stall, the one with the lower Speed moves first. If two Pokémon are holding Lagging Tail/Full Incense, the one with the lower Speed moves first. If one Pokémon has Stall (and neither of the items) and another has Lagging Tail/Full Incense, the Pokémon with Stall moves first.
I exchanged Lagging Tail and Full Incense for every test I did to make sure that the two were interchangable.
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In other news, I did some more testing on Zoom Lens at Phuquoph's request. I used a Zoom Lens Fire Blast 45 times against an opponent using a non-damaging move earlier in the round. All 45 hit. I also launched 40 Zoom Lens Fire Blasts against targets switching in. All 40 of those hit, too. So, it's fairly safe to say that the criteria for Zoom Lens activating are the same as the criteria for Payback dealing double damage: the target must have already taken an action or switched in previously in the round.