Great idea. Here it is:
Bertha was overjoyed. Ash, the love of her life, had expressed an interest in taking things a step further. How incredible!
She went home and scribbled a note:
Dear Ash,
Meet me tonight at The Wooper's Face restaurant. I'll make all your dreams come true, as you've made mine come true.
Love, Bertha
Bertha sealed the note in an envelope and sent out her trusted Gliscor.
"Take this letter to Ash's house, on the double. He lives in Pallet Town," she ordered. Gliscor gripped the letter in his tail claw and soared from the hotel, straight out of the window. As he fulfilled his mission, Bertha decided she needed some fly gear if she was going to make Ash happy. She phoned Waterina, Misty's 90-year-old grandma, and asked her if she had anything. Much to Bertha's dismay, everything Waterina owned was blue.
But, it was for Ash, so Bertha decided to suck it up and take this woman's clothes.
A simple blue gown. Sparkly blue heels. Blue hairpins. Surely, Ash would like this?
She flew to Cerulean City, stood outside The Wooper's Face, and waited.
(scene cut to Gliscor)
Gliscor was mad.
"How does she even expect me to find this kid's house???" he fumed in spatterings of his own name. "Not like I've ever been...wherever this godforsaken region is. I wanna go home. Bertha is 127 years old. I'm surprised she can even blink without going into cardiac arrest, let alone wait in the cold for some kid who is probably killing her as we speak. There's no way he would want to be with Bertha anyway."
He contemplated this. He looked at the message he was charged with delivering. "And if she's dead..."
Another moment of contemplation.
"...then that means..."
Another tense moment.
And then... realization.
"I'm free! I'm free! I can be my own Gliscor!" He unclamped Bertha's letter, and let it flow freely in the wind. "Die, infernal note of Hades! FIRE FANG!" Clamping down on it at light speed, Gliscor ate the note, then swooped away as the embers fell into Viridian Forest and burned it to the ground.
(later that evening...)
Bertha looked at her Wormadam Sandy Cloak watch. Quarter to 11. The Wooper's Face is closed. But where was Ash?
"He'll show...I know he will... I love him... I'll wait for him forever if need be..."
(three weeks later)
They embraced. Ash spoke up. "You look aesthetically pleasing."
The rest... is history.