How do I summon a Legendary Pokémon with the Secret Slab?

Question

I'm trying to recruit Zapdos in Pokémon Mystery Dungeon: Explorers of Time. He is able to be fought on the 7th floor of Amp Plains if I have either a Secret Slab or an Enigma Part in my bag. I got to the 7th floor and walked everywhere, but no Zapdos. Then I selected 'Use' on the Secret Slab, but it just disappeared and nothing happened! How am I supposed to use it to encounter Legendaries?

Comments

If it helps, I changed the Team Leader from my starter, Riolu, to Spinarak.

---

Have you recruited Manaphy?

Answer 1

Hmm. The only solutions I can think of is either a) you've already recruited Zapdos and just forgot about it, or b) you haven't recruited Manaphy, or c) he hasn't talked to you about the Marine Resort. (But I don't think Secret Slabs appear until you recruit him, anyway.)

Comments

You need to recruit Manaphy!? I didn't know that. But I have three Secret Slabs already. Oh well. That helps a lot. To the Surrounded Sea!

---

Yep. You've also got to let him tell you about the Marine Resort.

---

Thanks a mil!

---

Awww, you only recruit Manaphy after Darkrai.

Answer 2

Im sorry since this is years after but you don't use the secret slab. The Pokemon appears in the dungeon so when you hit the floor I suggest you look at the recruitment search menu. And I also suggest not using that slab as a consumable.

Comments

He has already got an answer he likes. Please dont necropost

---

‘Necroposting’ is 100% fine if it’s contributing insight like this is.
Other people might access this question and find this answer more helpful.