Cannonsense

"Look who's finally shown up. You've fallen for my trap again, Calvin! Try to escape my 12 Rooms of Doom... If you can."

- 12 Rooms of Doom 3.

Cannonsense is the Main Antagonist of the 12 Rooms of Doom franchise. He first appears as the final boss of 12 Rooms of Doom. He just sits there, similar to Gradius, But his cannonball will chase you around. To defeat him, you need to reach him. climb the Black, then move to the right spot without the top black touching you.

He also returns in 12 Rooms of Doom 2 as the Secondary Antagonist. He has a new attack system. But it just makes him easier to defeat.

He appears again in 12 Rooms of Doom 3, once again, as the main antagonist. He opens a false casino to trap Calvin again. He then challenges him to escape again.