Izzy don't need no magic to hone in on crystals with as much accuracy as Rarity did with gems.

Izzy: "Now we've got another unicorn around, we can bounce off each other's sparkle in song! Join me, Misty: 'This is how a unicorn walks – walks!'"
Misty: "'This is how a unicorn… smiles?'"
Izzy: "That's not how the song goes…"
[Misty sweats nervously]

Zipp: "That better not be your attempts to provide non-verbal summaries of your reactions to our new webseries. So help me, if it's a joke…"

Zipp: "Okay, so here's how you practise using a tranquilliser. You find an easily-distracted target – I recommend diva sisters, though crafts-obsessed ditzy unicorns work equally well – make up some excuse for them to pose, and then, let them have it!