As its name implies, part of Bowser's Castle is completely flooded with lava due to strong volcanic eruptions in Koopa Kingdom forming this lava pool, becoming more dangerous and there are mechanisms in his castle used to control lava.
The heroes team need too confront Bowser, but as always the same do not leave that easily. Because the lava creatures jumps out, battle with Mecha Koopa emerges, traps that does back again when someone steps on a Unlucky Space and Bowser spits fireball which takes 46 Stars (unless it stays below the fire line).
When reaching the end of the walkway, they will face off with Bowser himself in both his first form and his skeletal form in the final showdown on an arena away from the castle.
- Mecha Koopa
- This is one of the 3 boards playable in Bowser Party.
- This castle's walls are similar to those of Bowser's Castle map in Super Mario Bros. 3.
- Part of the castle's walkway is similar to Super Mario Bros. where plunders get approaches of battlefield.
- Unlike the other boards belonging to Bowser, the Chaos Castle is the first, and currently only Bowser-themed board in the entire Mario Party series that not unlockable.