* Opal is a Fairy-type Gym Leader from the Johto region in Pokémon Gold, Silver, and Crystal. She is known for using Pokémon like Togetic, Altaria, and Azumarill. She doesn't have a legendary Pokémon connected to her.
* Onyx is the Rock-type Gym Leader from the Kanto region in Pokémon Red, Blue, and Yellow. He is known for using Pokémon like Geodude, Rhyhorn, and Onix. Like Opal, he doesn't have a legendary Pokémon specifically linked to him.
However, it's important to note that some Gym Leaders in the Pokémon games have themes or preferences that might loosely connect them to certain legendary Pokémon. For example:
* Opal's love for Fairy-type Pokémon could be linked to Jirachi or Diancie, which are known for being Fairy-type legendaries.
* Onyx's specialization in Rock-type Pokémon could be connected to Regirock, a legendary Rock-type Pokémon, though this isn't an official connection.
Ultimately, there aren't official legendary Pokémon associated with either Opal or Onyx.