[ In this case, Weiss is just happy he's helping. Eventually she comes in, having helped Type:Null up the elevator. Thankfully it's a large elevator and they're able to squeeze Arcanine in for him to lean against. The rest of her Pokemon are away in their balls by the time she gets there.
Mewtwo can probably tell just visually that Null looks like some kind of mixed up combination of Pokemon turned the wrong colors and all kinds of stuff, with that helmet designed similar to Arceus that doesn't seem to come off. Weiss looks at Mewtwo for a moment, then back to Null to hold the door open. It seems like it's walking a little more stable, but still looks lethargic. ]
[Action]
Mewtwo can probably tell just visually that Null looks like some kind of mixed up combination of Pokemon turned the wrong colors and all kinds of stuff, with that helmet designed similar to Arceus that doesn't seem to come off. Weiss looks at Mewtwo for a moment, then back to Null to hold the door open. It seems like it's walking a little more stable, but still looks lethargic. ]
Null, this is Mewtwo.