In order to unlock Legendary Pokémon encounters, a player must obtain ribbons by defeating gym leaders. Each ribbon represents a Pokémon region and unlocks its respective legendaries. All gym leaders in a region need to be defeated. You can track your progress from your profile by checking your obtained badges. In the past, elite 4 members, champions, battle frontier brains, and battle maison members had to be completed for all legendary Pokémon to become obtainable but is no longer the case after a v4 update.
Indigo League
Gym Leaders
| Pewter City Gym | 
|
Brock
| |
 
| |
| Cerulean City Gym | 
|
Misty
| |
  
| |
| Vermillion City Gym | 
|
Lt Surge
| |
   
| |
| Celadon City Gym | 
|
Erika
| |
   
| |
| Saffron City Gym | 
|
Sabrina
| |
    
| |
| Fuschia City Gym | 
|
Janine
| |
    
| |
| Cinnabar Island Gym | 
|
Blaine
| |
     
| |
| Viridian City Gym | 
|
Giovanni
| |
    
| |
Orange Islands League
Gym Leaders
| Mikan Island Gym | 
|
Cissy
| |
 
| |
| Navel Island Gym |
|
Danny
| |
 
| |
| Trovita Island Gym |
|
Rudy
| |
   
| |
| Kumquat Island Gym |
|
Luana
| |
| |
Head Gym Leader
| Pummelo Island Stadium | 
| ||||||
Drake  | |||||||
| |||||||
Unlocked with Kanto Ribbon
Other Legendary Ribbons
| Legendary Ribbons |
|---|
| Kanto · Johto · Hoenn · Sinnoh · Unova · Kalos · Alola · Galar · Paldea · Vortex |