What's the earliest point in a Pokemon game you can obtain a legendary?

Question

I'm not just talking about the main series games, the side games like PMD count too.

Comments

just PMD or pokemon main games as well?

---

I think it's a Zapdos or something, but I'm too lazy to look it up

---

Does the Mew glitch in RBY count?

---

what about Entei or Raikou?

---

Does trading or hacking count?

---

The main games count too (I was mainly looking for main game legends more than side game ones), and I wouldn't say glitches, trading or hacking count.

Answer 1

Of all the Pokémon games I can think of, the earliest possible point you can obtain a Legendary Pokémon is in Pokkén, which is technically a side game and therefore falls under your specifications. You can use Suicune as soon as you start the game.

If Pokkén doesn't count then I can hide my answer.