Ash was thinking who to use the pendant on, when he thought of Sabrina.
'If I can use this pendant to hypnotise her, then it should be easy enough to use it on everyone else' Ash thought to himself with a smile.
He quickly made Pikachu believe that he won't find it strange what he does with the pendant, and that everything is completely normal, before snapping him out of his trance. After that, they quickly ran to Oak's Ranch so that Ash could grab one of his Flying Type Pokemon, before heading off to Saffron City.
Once they arrived in the city, Ash headed off to the Saffron Gym, just in time to see a trainer walk out with a grin.
"Well done on winning your badge," Ash then heard Sabrina's voice saying, before seeing her at the doorway.
The trainer jumped into the air with a smile, before running off to celebrate.
"Wow Sabrina, looks like things are going well for ya" Ash said with a grin as he walked over.
Sabrina looked at Ash, and smiled at him. "Ash! What a lovely surprise to see you" she said, before giving him a hug. "What are you doing here?" she asked him.
"Oh, I was nearby and thought about seeing you" Ash said with a shrug.
"Well, come on in" Sabrina said, as she entered the Gym, with Ash not far behind her, with Sabrina closing the doors behind them with her powers.
"Looks like you've gotten a good grip on your powers" Ash said with a grin.
Sabrina grinned back at him, as she gave a nod.
Once they were inside, Sabrina lead Ash to the battle arena. "So, how are things?" she then asked him.
"Things are good thanks. I also have something that I wanted to show you" Ash said, as he pulled the pendant out before swinging it before Sabrina.
"Hey, that looks....like a....Hypno's pen...." Sabrina was saying, before she went into a trance.
Ash grinned at this, as he thought of what to do with her.
Option A: Ash gives Sabrina a command to follow, but she starts to fight against the hypnosis with her powers, causing Ash to try and hypnotise her even more by putting her in a deeper trance
Option B: Ash makes Sabrina believe that she's whatever he says she is (ie; Sabrina, your my sexy servant)