After seeing spinda and doing feiry field and beating Entei
They are found on floor 29 of lightning field.
there are 30 floors like fiery field and north wind field
You beat Entei in Fiery Field. NOTE: You'll need Surf.
In Pokémon Mysery Dungeon: Blue Rescue Team, you can find the electric-type Pokémon that is called Pikachu within the dungeon that is called the Lightning Field and in the Lightning Field dungeon, you can find it on Floors 6, 7, 8, 9 and 10.
there are 30 floors! Its going to be the same for Fiery Fields and North Winds
in firey field
At lighting field
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!
You can find one in blue rescue team by going to Lightning Field then go to the place to evolve with the stone.
Lightning field 30th floor be sure to have Surf to enter the dungeon.
u will mostly find it in Lightning Field on the 29th floor
30 floors.