A Bayonetta 2 fact sheet from Nintendo provides a little insight into the game’s two-player online co-op feature known as “Tag Climax”. Check it out below:
In online quick matches, you can wager halos, the in-game currency that you
earn by defeating enemies. You receive a large sum back if you can prove
you’re a better fighter than your partner. Halos can then be traded in a story
mode shop to unlock new techniques, buy accessories and pick up alternate
weapon variations.
