Hoo boy, this duo of games. Developed by Capcom, these games went through several changes in intent before finally resulting in these two. First there was supposed to be six games (one of which being a remake of TLOZ), then three games, and finally these two.
The opening of both games sees Link riding on horseback to Hyrule, as if he were returning from a long journey. He is then summoned to Hyrule Castle by the Triforce (the
complete Triforce) and whisked away on a mission to either Labrynna or Holodrum, two other countries outside of Hyrule. The
game manual for OOS shows the Triforce refer to Link by name, as if the two are familiars. The manuals for
both games refer to Ganon as "the specter of the greatest evil Link has ever known!" This is a Link who has fought Ganon before, who is now dead since the
Oracle games see the Twinrova witches, Koume and Kotake, trying to resurrect him. This would then place these two games after a game in which Ganon is destroyed, which we're currently limited to just TLOZ and ALTTP. The completed Triforce being inside Hyrule Castle at the beginning of the games, and the Triforce's familiarity with Link, suggest the
Oracle games to come after ALTTP.
What's more, the
Oracle games use a slightly modified version of the LA game sprite of Marin for Princess Zelda, which matches up with Link initially mistaking Marin for Zelda in that game.
While Marin's expy Malon (originally from OOT) also appears in OOS, she is given a completely new sprite different from that of both Zelda and Marin, as if to reinforce Marin's resemblance to Zelda that led Link to mistake her for Zelda in the first place.
All this strongly suggests a connection between the
Oracle games and LA. The strongest piece of evidence people point out is the very end of the Linked
Oracle Game showing Link sail out to sea aboard a boat that looks remarkably similar to the boat Link sails on at the beginning of LA.
Though, the ending also shows a castle in the background of the country that Link sails
away from. This can only be Hyrule Castle since neither Holodrum nor present-day Labrynna has a castle. If this were to lead into LA, then this would be the start of Link's departure from Hyrule to go train in other lands after saving Hyrule from Ganon, as described in the backstory for LA. Plus, the Nintendo Switch remake of LA gave Link's outfit the same color scheme as the outfit he wore in the
Oracle games. And an artbook released for the Switch version of LA included art of Link's shields from both ALTTP and the
Oracle games.
However, something thing people like to point out that seemingly contradicts the Link and Zelda of the
Oracle games being the same as those of ALTTP and LA is the fact that Zelda seems to not know Link in the
Oracle games, as she introduces herself to him: "Thank you for rescuing me. My name is Zelda." But what's often overlooked about this is that when she introduces herself, she also says "You are Link, right?
I knew it at first glance." This suggests that she did recognize him, and that her formal introduction could be out of a sense of courtesy in case
he didn't remember
her, as if a long enough amount of time has passed since their last encounter.
The
Zelda Encyclopedia placed the
Oracle after LA, but likely because of the confusion surrounding Zelda's dialogue, and decided the Link and Zelda from the
Oracle game were a different Link and Zelda from those in ALTTP and LA. But all that's really needed is for there to be enough time set between the
Oracle games and ALTTP to warrant Zelda's sense of propriety.
So, comes the question of whether the
Oracle games should come before or after LA. If LA were to come before the
Oracle games, then the Linked Game ending seeing Link sail away from Hyrule would lead into his training prior to LA, which a lot of people like to believe. There is also, allegedly, an old developer interview from a 2000 issue of
64DREAM that, ostensibly, claimed that the
Oracle games were indeed supposed to be set between ALTTP and LA, with the Linked Game's ending scene indeed meant to lead into LA.
However, if one were to take, at face value, the opening of whichever
Oracle game one chooses to play first, in which Link is seen returning to Hyrule on horseback, this would mean that Link left Hyrule after ALTTP on some unseen, undisclosed journey, returned to Hyrule only to be sent to either Labrynna or Holodrum, where he had one adventure, returned back to Hyrule, only to be sent to the other country, had the other adventure there, fought and defeated Ganon in the Linked Game ending, returned to Hyrule
again during the Linked Game's end credits, and
then sailed away from Hyrule to do some months of training, before getting shipwrecked on Koholint Island. That is a LOT to work out, with Link going on an entirely unseen journey between ALTTP and the
Oracle games.
Conversely, if one were to instead place the Oracle games after LA, that would mean Link left Hyrule to train for a few months after ALTTP, got shipwrecked on Koholint on his way back, and eventually made it back home to Hyrule safe and sound, only to be sent away on two more adventures before confronting a revived Ganon in the
Oracle games, and
then sailed away on another undisclosed adventure. It's still a lot, but it seems a bit less complicated in this setup.
Basically, either scenario looks like this:
Oracles come first: ALTTP → Link leaves Hyrule for whatever reason → Link returns to Hyrule but is sent to Labrynna or Holodrum → first Oracle game → Link returns home again but is sent to the other country → second Oracle game → Link defeats Ganon and returns to Hyrule again → Link sails away to train in foreign countries → LA
Oracles come after: ALTTP → Link leaves Hyrule to train in foreign countries → LA → Link returns home but is sent to Labrynna or Holodrum → first Oracle game → Link returns home again but is sent to the other country → second Oracle game → Link defeats Ganon and returns to Hyrule again → Link sails away from Hyrule for whatever reason
In the second setup, the unknown part of the story doesn't come until the end, which is already supposed to be a long, unexplored gap of time until the next game in the timeline, anyway.
What's more, placing the
Oracle games after LA gives more time between ALTTP and LA, making Zelda's formality make more sense. We don't know how long it took Link to get back to Hyrule after LA, and that makes it plausible that it took him a long time (maybe a few years, even) to return home after being stranded out at sea. As for the boats seen in both games, they don't need to be the exact same boat. They could simply be the same
kind of boat instead.
LA was clearly meant to be a direct sequel to ALTTP, with the final Nightmare taking the forms of Agahnim and ALTTP Ganon as if it had scanned Link's mind and was trying to psyche him out by taking the forms of the two greatest enemies that Link had most recently fought. Otherwise, placing the
Oracle games before LA retroactively begs the question of why the Nightmare didn't also take the forms of Veran and Onox, whom Link would have battled even more recently.
And finally, the Linked Oracle games' ending also features a scene that could be interpreted as the Triforce splitting, which would set things up, narratively, for the later placement of
A Link Between Worlds. Thus, ALTTP would end with Ganon defeated and the Triforce safe in Hyrule, Link leaves Hyrule to go train and gets temporarily stranded on Koholint Island during his return in LA, then he makes it back to Hyrule only to be sent on two more adventures before defeating a resurrected Ganon in the
Oracle games. The Triforce is then split after this defeat of Ganon, setting up its status quo in
A Link Between Worlds.
It really seems like the
Oracle games were made with LA in mind, but without the knowledge that LA was meant to be a direct sequel to ALTTP.
On the subject of which
Oracle game should precede the other, completing Ages before Seasons does result in more complete side-quests that carry over between the two, with the Linked version of OOS continuing side-quests started in OOA. For instance, Queen Ambi from OOA is reunited with her long lost love, the pirate captain from OOS, which does not happen when OOS is played before OOA. And in the Linked version of OOS, Onox mentions Link having defeat Veran in OOA, while Veran in the Linked version of OOA does not mention Link's defeat of Onox in OOS.
The
Oracle games' depiction of Impa also make more sense in the order of Ages preceding Seasons. In the normal version of OOS, when Link first meets Impa, she pretends to be the cook of Din's performance troupe, before she tells Link the truth about her actually being Princess Zelda's nursemaid sent to Holodrum to protect Din. There was no reason for her to hide her identity from Link. In the Linked version of OOS, she instead already knows Link after having already encountered him back in Labrynna during OOA, and so is honest with him upfront about her business in Holodrum.
Meanwhile, in
both the normal and Linked versions of OOA, Impa seems to introduce herself to Link as if the two never met each other before, but this is also when she is possessed by Veran, who wouldn't know if Link and Impa ever knew each other or not. But, in only the Linked version of OOA, when mentioning that Zelda sent her to Labrynna to protect Nayru, Impa says to Link a very confusing line: "We should not have forgotten you, the hero of Holodrum." That they could have simply "forgotten" about Link right after he saved Holodrum in OOS is just baffling. Conversely, playing OOA before OOS has her not speak this line, letting her dialogue flow more naturally.
Thus, in the order of OOS → OOA, Impa bizarrely fibs to Link about who she really is when they first meet in Holodrum, and then seemingly just "forgets" about how useful Link is as the Hero when they meet up in again in Labrynna. While in the order of OOA → OOS, Impa doesn't say anything nonsensical when she and Link first meet in Labrynna, and then she is both honest and familiar with him when they meet up again in Holodrum. The latter arrangement just makes so much more sense.
Therefore, I'll be putting the
Oracle games after LA, and OOA before OOS: