Before The Shadows Fade
Lol, believe it or not I actually enjoy this song! And *gasp* Rachael Lillis and Veronica Taylor are holding out notes for once!
You should give the song a try. Unlike "It Takes Two," this song matches up with the character's personalities and they're having a lot of fun singing it. I wonder if Ohtani Ikue gets payed for those Pikachu sound clips...

Ash: There's a feelin' I'm gettin'. I just can't explain. Makin' me glad tonight. Maybe it's Christmas. Maybe the snow. Maybe the mistletoe.
Misty: There's a secret I'm keeping that no one can hear. A feeling deep in my heart. Maybe this Christmas my true love will show. Under the mistletoe.

Ash: Jolly old Saint Nicholas, before the night is through there's somethin' very special that I'd like to say to you. Merry, merry Christmas. I'd like you to know:
Misty: I'm hoping that I meet someone under the mistletoe.
Ash: Now there's a crowd at the party.
Misty: Our friends are all here.
Ash & Misty: Everyone's warm and bright.
Misty: Maybe I'll keep him where hearts are aglow: under the mistletoe.
Ash: Maybe I'll just stand here and no one will know I'm under the mistletoe.

Boy, this party sure is crowded. Hey, wait a minute. There's Christmas cookies over there! Let's go get some, Pikachu!
Pikachu: Pika!
Misty: Hi, Ash!
Ash: Oh, hi, Misty.
Misty: Great party, huh?
Ash: Yeah. We were just going to get something to eat.
Misty: Hey, did you see Nurse Joy?
Ash [Laughing]: Yeah, maybe you can go tell Brock.
Misty: Maybe..not.
Ash: Anyway, can we please pass you? We're pretty hungry.
Misty: Oh, sure. O.K... um, uh...
[Ash trips]

Ash: Jolly old Saint Nicholas, (Misty: Jolly old Saint Nicholas...) before the night is through (Misty: ...before the night is through...) there's something very special that (Misty: ...there's something very special that I'd like to say to you.) I'd like to say to you. Merry, merry Christmas. I'd like you to know:
Ash: I'm hopin' that I don't get caught under the mistletoe.
Misty: There's a crowd at the party.
Ash: Our friends are all here.
Ash & Misty: Everyone's warm and bright.
Misty: Maybe he'll find out. You just never know.
Ash & Misty: Under the mistletoe.
Ash: Maybe I'll stand here, maybe I'll go.
Misty: Maybe this Christmas I might let him know.
Ash: Maybe this Christmas I just might get...uh-oh.

Misty: Hi, Ash. Did you get something to eat?
Ash: Uhh, yeah.
Misty: Uh, Ash, did you realize we're standing under the mistletoe?
Ash: ...Huh?...AUUUUGHHH!!!!!
Misty: ASH, where are you going?!!
Ash: Uhhhh, getting some Christmas cookies!
Misty: You just GOT some cookies!!
Ash: I-Y-Yeah, I know. Come on, Pikachu!
Misty: What's his PROBLEM, Pikachu?
Pikachu: Pika, Pika.
Ash: Come on, Pikachu!!
Misty: Aash, look out for the...
Ash: WOOAAHH!!!
[Ash crashes]
Misty: Oh, nevermind.
[The background singers continue to sing the line "Under the mistletoe." until the song fades out]