Not all of them, but if you have a Charmander, that one eventually will. Of course, it will be a dragon when it does, so you can probably just let it hunt.

[She tosses out a ball and a dopey looking walrus pops out.]

... Okay I'll go with that. Rain Dance, Rolley!

[Clapping its flippers together, the Walrein summons a huge raincloud to wash the sand out of the sky. Tower roars in anger at this and glares down at Rolley while Twi dives into the sand.]

Keep her distracted while I find her ball!