mainLegendaryPokémon

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: mainLegendaryPokémon

Indicates that one Pokémon serves as the primary or central legendary Pokémon associated with a particular context, such as a game, region, or storyline.