There are no maps. It's a "mystery" dungeon. Ever notice how the layout changes every time?
There are 10 floors in Mt. Thunder, and 3 floors in Mt. Thunder Peak to get to Zapdos.
There are 10 floors to go through on Mt. Thunder. That take you to Mt. Thunder peak, which has 3 floors.
Zapdos
Rescue Jimpluff at Silent Chasm, and Zapdos will come and tell you to go to Mt. Thunder to battle him for Shiftry
Thunder Mountain, Mt. Mcginnis, Mt. Juneau, Mt. Jumbo... etc
Zapdos is in Mt. Thunder Peak. Moltres is in Mt. Blaze Peak. Articuno is in Frosty Grotto. To meet them again and recruit them, pass Mt. Thunder, Mt. Blaze, and Mt. Freeze without doing any rescue missions.
4 mountains Matterhorn Mt Space Mt Big Thunder Mt Splash Mt
It is 345 miles according to Google Maps.
Google maps
you can find zapdos in mt thunder
It is 226 miles according to Google Maps.
you help jumpluff in silent chasmAnswerAfter you defeat Team Meanies in Sinister Woods, make your way over to Silent Chasm to rescue Shiftry and Jumpluff. You won't find Shiftry there, so you must go over to Mt Thunder. At that moment, Mt Thunder is unlocked. This also works in Blue aswell.