Board Thread:Questions and Answers/@comment-173.81.97.176-20141031123611/@comment-76.79.45.174-20141031134854

The newer characters use bulbs for evolution fusions. It is just the newest fusion character/item you have to catch. The reason that they are a big deal this week is that the two halloween charters that came out need bulbs to evolve.

The downside is that there isn't a regular day of the week that you get to go catch them on. You just have to watch for that day in the Vortexso far.