As far as I can tell, there's 5 may-cast healing talents in-game. If you don't have money/Crowns to spend, and don't want to bother breeding; there's a few I can recommend.
Frankenbunny has a may-cast Healing Current and also has Storm-boosting talents. In 10 levels time you can get the Kraken pet which has Spritely. If you're in Celestia now or soon, pretty much every pet there has Spritely. That being said, the Energetic Baaterfly in the Crowns Shop (3000 Crowns) can learn Sprite Queen along with other Storm-boosting talents.
But the Frankenbunny is a brilliant first-gen Storm pet; nevermind that it's not Crowns-only.