Super Mario Bros. X Forums

To begin with, there're shy guys placed on blocks. You can't see them because I hide them with black background. The setup is shown below.



Which move does Dark Bowser use is based on which shy guy's death. I used many layers and events to make sure there's only one shy guy fall each turn. After a shy guy's death, the move to use is decided, and a new shy guy will be spawned. But then another blocks layer is shown to prevent any shy guy fall. (This block layer is also shown when it's player's turn or the game ends.)
Also, the blocks under shy guys are not at the same layer. Let's say there're four blocks. Block 1 & Block 3 is at Layer A, while Block 2 & 4 is at Layer B. (These blocks are gray blocks.)
Every time it's boss' turn, Layer A & B are shown alternately using toggle layers.
But only 2 layers won't be enough to decide the move. I need another four blocks at another layers. This time, Block 1 & 2 is at Layer C, and Block 3 & 4 is at Layer D. (These blocks are note blocks.)
Layer C & D are also shown alternately using toggle layers, but not every turn. I use another NPC to decided whether Layer C & D are going to switch or not. This NPC is spawned every player's turn, and it moves either left or right (It's random). When it fall to death, trigger the event to toggle Layer C & D. Otherwise it will go into the "U" hole and not trigger the event. This is what makes the system looks like it's "partially" random. In fact, Dark Bowser's first move is always the same.
As for the special attack, I use the fifth shy guy. (The rightmost one) The blue block is disappeared only when the first Dark Bowser is defeated.
That's all. I tried my best to explain it. And yeah, I know it will be easier to implement such system using lunalua, I just haven't studied how to use it. Maybe I will in the future. But I think making this without lunalua is quite cool, right?