This is a sweet card that elevates Sidekick from a one-off card design to an actual archetype for your deck. I initially assumed the healing option would be the default to get extra uses out of strong sidekicks like Captain Marvel or Honey Badger. But since Sidekick gives your ally so much extra health, I think you'd rather pump both characters most of the time since you're not going to run out of hp anyway. The pump is extra nice because it lasts to the end of the phase, so any additional way to ready your hero like Self-Propelled Glide or Honey Badger gets extra value. If you're going for the sidekick deck, I'd also recommend some cards like Call for Backup and Suit Up to help you find your signature ally early.