Morty knows he shouldn't be screwing around with multidimensional shit. It's dangerous, it's impractical, it's blah blah blah. But it's a potential key to unlimited energy, how does nobody see that? He's built a dimensional siphon (it kind of looks like a cardboard box with a funnel and a TI-84 taped to it, but it damn well works), keyed in the dimensional coordinates to a random plane, and by God he's going to use it.
He flips the switch and waits for the energy bar to fill up.
It does! It fills up very rapidly. Then it explodes, along with the box. There's rather more smoke than there should be, and once the smoke clears someone is standing there.
"Oh dear," Morty says faintly.
"I could use a glass of water and then I'm all set to go." She even has remotely appropriate gym-type clothes on, what with the shopping trip yesterday.
"I don't have any strong reason to object, but why will there be more people observing?" asks Bella.
Bella laughs, and ponytails her hair for convenience. "I don't mind being shiny. Are the tests calibrated to take into account that I have no actual training in many forms of complex Olympic derring-do? That is, my form is going to be off unless somebody coaches me on it and this will affect how good I am at running, jumping, turning cartwheels along a balance beam, etcetera."
One of the later tests appears to be another test of speed. She is placed on a treadmill and set to go at a certain rate.
Abruptly, out of the console pops a boxing glove on a spring, moving much faster than aerodynamics should allow it to.
"Alright, our tentative 'rating' on you is Ex-2/Wa-5:lb/Esp-2. You're an Olympic-bodied genius who can teleport a lot and has a weird interdimensional sister-connection. Which puts you firmly in the mid-tier at Whateley, slightly upper tier in terms of all mutantkind, and in the dust in terms of the super-entity community. Though you're a serious contender in terms of sheer convenience. Congratulations et cetera."
"Noted. Thanks for the eval. Except for the boxing glove. Not thrilled about the boxing glove. Do I get my card right now?"
"What fun I'm sure that is, and less taxing on the intellect than coming up with decent puns. Yeah, I'm ready to see if I bounce off some wards, if that's what you mean."