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Phoneposting, but here are my ideas:
Grass/Fire: Eucalyptus pokemon, maybe it's a rainbow serpent as a further nod to Australia. It uses oils stored in its flakey bark to ignite fires. Pic related, rainbow eucalyptus.
Fairy/Dark: Card dealer pokemon, it's a cute mischevious pokemon with neon Las Vegas and stage magician motifs
Normal/steel: A turtle with a small building for a shell, styled as a sterotypical japanese castle. Steel because it's a sturdy-looking pokemon, normal because the Asian architechture meme of sloped roofs warding away ghosts