just go to the 40th floor in lightning field, beat Raicu, and let him change your feather, and he will give you access to the Northwid field. It's that simple!
1st you must get the clear wing from Spinda . Then after you beat Fiery field and Thunder Field you are given access to Northwind Field
Use a Key on 27F in Northwind Fields and get the Water Stone.
First you need to get SURF from solar cave, then sleep a day and a spinda will be in the town square, you will then take it to your rescue base and it will give you a CLEAR FEATHER. It says you can now ggo to Fiery Field. You beat fiery field (30 floors) then lightning field (30 floors again) then northwind field (30 floors) and you get the rainbow wing and you can go to mt.faraway.
Mt Faraway is located towards the top left corner of the world map in Pokemon Mystery Dungeon Blue and Red Rescue Team. To access this dungeon, you must have cleared the Fiery, Lightning and Northwind Fields and have in your possession the Rainbow Wing. After you defeat Suicune in the Northwind Field, Mt Faraway will be unlocked and you may travel there with your team (as long as one Pokemon knows Surf or you have the HM in your items bag).
30 floors.
Red/ Blue: Northwind Great Land 29F
u need to go to 20th floor of Northwind dungeon.
you must get the Clear Wing from Spinda then you go to Fiery Field beat Entei he turns it to the red wing go to Lightning Field beat Raikou he turns it to sunset wing got to northwind field beat suicune she turns it to rainbow wing go to mt faraway Ho-oh is on 40F
in blue rescue team you are a pokemon, so you cant catch pokemon, you are friends with them.
Go to northern field where suicune is at.
entei on fiery field
Sacred Field - for all 3 dogs