no
the three islands
You need to receive a Challenge Letter from it.
you need to have beat either suicune or raikou
In Pokemon Mystery Dungeon Red Rescue Team, you can beat/meet Suicune by having a Pikachu or Raichu on your team. You can get a Pikachu from Raikou's dungeon (I forgot what that dungeon was called), or have him as your partner at the beginning of the game. For more benefits, have your Pikachu learn Thunderbolt. Answered by: QWERTY
concealed ruins with secret slab or mystery part
Battle him again.
30 with raikou at the end..veronica
they are both level 30
get either the mystery part or secret slab, then take one of them with you to Concealed Ruins (I think). Raikou will appear on the 20th floor.
You go to Thunder Feild (or whatever) and on floor 30 Raikou should be there. All you need to do is keep battling him until he joins. I know he hasn't joined my team yet.....
In the north west of the map. It is one of 4 dungeons. The boss is raikou.
The Bolt Fang is a treasure item for Raikou. If it's in your treasure bag, a Raikou in your party will ignore an opponent's Reflect and Light Screen when attacking.