Once you get through the instructional guides, you can find many tips and reminders in them that help you in all subsequent gaming battles.
The only downside to this is that your opponent gets to choose which of their Benched Pokemon to bring out
It doesn't help that Kaheera is a Cat but not an Elemental, but I'm guessing that there will be some combination of an Elemental framework of Leafkin Druid, Risen Reef, and Omnath, Locus of the Roil along with Kaheera, Questing Beast, and a few other choice creatures
Now consider that Visions put phasing in close proximity with some of the all-time-best ETB triggers, and that the average players understanding of the rules (and to be fair, the rules themselves) were much more loose than in our present era
Thankfully, were here to answer that exact question