'Chexcalibur': Not a Real Board Game – Likely a Cereal/Excalibur Pun

No board game named "Chexcalibur" exists in any database (BoardGameGeek, Amazon, publisher catalogs). It's almost certainly a portmanteau joke combining:

• Chex — the cereal (Ralston Purina / General Mills), famous for Chex Mix and 90s CD-ROM games (Chex Quest).
• Excalibur — King Arthur's legendary sword.

If You Want Arthurian Board Games

• King of Tokyo (dice-rolling, monster mayhem, Tokyo = Camelot reskin).
• King Arthur's Knights (cooperative questing).
• Merlin / Avalon (social deduction, Arthurian roles).
• Shadows over Camelot (co-op with traitor).
• Chronicles of Crime: 1400 (app-driven mystery in Arthurian Paris).

If You Want Cereal-Themed Games

• Chex Quest (Doom mod, free, playable on GZDoom).
• Custom "Chexcalibur" Homebrew: Design it! Cereal-box cardboard, Chex pieces, Excalibur spinner — great kids' project.

Either way, the name is up for grabs if you want to publish the first Chexcalibur.