What's the best crappie bait to use for catching these spunky fighting papermouths? We're talking about bait, not artificial lures, right? It should be fair to also mention that live bait can outperform dead bait or even artificial for crappie fishing.

There are some other notable things to think about. Juvenile crappie will feed on small insects and bugs. As they mature into adulthood they begin feeding more on bait fish. However, black crappie will still feed on bugs throughout their adult lives. The crappie will also feed on small crustaceans such as little crayfish.
So consider using bugs and insects as crappie bait, such as crickets, grasshoppers, leeches, and if you can stomach the mere thought, maggots. You can catch your own baits like these. Or they can be found for sell at many bait and tackle stores like Bass Pro Shops. They can last up to around a few weeks after they have been opened.
Other options to creatively think about considering can be the feeder fish from your local pet supply stores. They're usually orange, or sometimes white or black. Because of their relatively small size and shiny orange colors, they fair nicely for attracting some quality crappie.
If your able to, you can catch your own live bait fish with a throw net. Most of any type of small bait fish should produce well. Small threadfin and gizzard shad, ship jack, smelt or small fry species of other game fish are some examples. Smelt is considered as an endangered species in some areas of water throughout. So be sure to understand the laws and regulations before you follow through with netting your own live baits.