What kind of chocolate is used in chucke cheeses cake?

Unfortunately, Chuck E. Cheese's doesn't publicly disclose the specific ingredients of their chocolate cake.

However, based on general cake recipes and the fact that Chuck E. Cheese's aims to provide a kid-friendly experience, it's likely that the cake uses a common chocolate cake mix as its base. This is then likely enhanced with additional ingredients like chocolate chips, frosting, and possibly a chocolate ganache to give it a richer chocolate flavor.

If you're curious about the exact recipe, you could try contacting Chuck E. Cheese's customer service or looking through their online menu for more specific information.