It's easy if you can beat the level W2-2. Then beat W2-3 and you unlock the cannon level. If you want to go on, Use the pipe. If you don't want to skip levels, play the W2-3 level again. Then you unlock the next level (In the same world). The cannon goes to W5 (World 5).
First go to world 4 haunted house, next at mini Mario at the fifth/sixth room jump on the pipe to the next room and kick-jump on the three blocks, then kick-jump through the thin path until you reach the door, finally enter the door to the red flag.
First, you must find the alternative exit in level 2-3. The exit is found in the room with the water rising and falling. Once the orange button is hit, swim up to the top room and hit the second switch. Then you must hurry to the platform up the very top and exit the level from there. This will unlock level 2-A.
You must find another alternative exit. Jump from the last spinning platform. Head as far right as possible, then land upon the Red Koopa, to bounce up and fly up again and reach the yellow warp pipe on the right. GO through the yellow pipe, and then follow on and finish the level to unlock the World 2 Cannon.
This cannon will take you to World 5.
Go to the world 1 tower at the 2nd star coin at the door DO NOT go into the door. Jump over the two moving blocks on the right and smash through the blocks with a shell to the red pipe. Enter the pipe to the red flag.
well this is my question but the computer is stupid and doesnt no so just try to figure it out
you have to find the secret exit on the haunted house
in world 1 at the tower there is a red flag that you need to get to unlock the cannon.
you can unlock a level with a pipe and cannon around it (i got it on a red flag on world 2 number 4 ) and finish that on a cheat flag( the yellow pipe above the other 1). this will unlock the cannon.
you have to finish the level
You go to the midway castle
it is not stars it is a world
There is no cannon on world 1
Go into the first castle and when you get to the partwith the 4 rows of falling blocks run and jump at the black part of the left wall.
Complete level 6 sfeb5h6bgtegbu
look up super Mario bros Cannon world 1 and level 1
The French tank of World War One had a 75 millimeter cannon on its turret.
level 3
I think you mean how to unlock it. -Either complete World 5 by defeating the boss with MINI MARIO. -Or unlocking the cannon on World 4.