Pokemon Stadium - Pika Cups - Transfers ONLY from new game FAQ:

Q: What is this run?
A: Basically, only use transfers to beat the Pika Cup, while starting from a new file of RBY. So you have to play through the game and build a team to the point you then beat the Pika Cups.

The reason it is transfers only, is because otherwise the fastest method would be to to just use Rentals to avoid the team building altogether.

Run is also glitchless, as again with glitches you can very easily turn this into being completely uninteresting very quickly.

Q: How are you going so fast in Blue??
A: That's the Dodrio Tower, a mode in Stadium that lets you play RBY at 4x speed, as long as it's connected with a transfer pak.

Q: Is Pokemon Stadium from a new save file as well?
A: No, otherwise you couldn't do both the Pika Cups without all the other stuff.

Q: Will you do a run of Complete Game with transfers from new game like this?
A: No, because grinding to L100 from Prime Cup would be insanely boring and not fun.

Q: Will you do other cups/parts of the game like this?
A: Yes, I plan on doing Petit Cups too, as well as Little Cups in Stadium 2. Might also do GLC, we'll see.

Q: What is the route for the team you want to make?
A: Basically, get a L20 Starmie and Nidoking and power through with them. Nidoking is pretty much just for Mr Fix, otherwise it's the Starmie show.

Support will be a L15 Cloyster that can explode, and otherwise fodder. I considered getting a L15 Clefable as well, but I'll probably forgo it for now to see if I can win without it.

Because I want a Nidoking, I'll actually play on Blue, because it can buy a L17 Nidorino at the Game Corner. This means I'll play through the game with Squirtle, because getting Nidoran Males at the start of Blue is really rare, and no manips on Dodrio Tower. This kinda works out anyway, because Squirtle doesn't need early candies like Nidoking does for Misty, so I can save them for Staryu.

Q: Do you know if this will work?
A: Nope, just mapped out a general idea purely based on theory, I've done no testing at all. Given the nature of this run using multiple games and a transfer pak, the way to test this is with a run