So basically Dragon Darts will hit twice on one target if the other won't receive damage by the move (regardless of the reason, unlike Stomping Tantrum's condition for double damage)?two mechanics tested in one video. bolt beak (and presumably fishious rend) get double power on a switch in. also, dragon darts hits around phantom force, which is something that my earlier dragon darts tests didn't confirm (i'll link that twitter thread here too even though it was linked earlier in this thread).
Also, in one of the videos you did not share, if Dragon Darts is redirected by Follow Me and it was supposed to hit one target twice, both hits will be redirected to the Follow Me user. Also confirming that, despite its smart targeting, Dragon Darts won't bypass immune redirections.
So this begs another question. How does Dragon Darts work under Normalize or Electrify? Will it smart target under Normal or Electric effectiveness, respectively, or will it still smart target with Dragon-type effectiveness?