Buy as many colored cards as possible in Port Prisma and ensure that you still have the Washing Machine from Strudelinsel. If not, then you have to buy a new one from Squeeze. Try to march up the rainbow and wait until Luigi rushes up with his kart. Take him upstairs, enter the castle and go to the painting, whereupon you fall into a trap.
Your next opponent is Roy, who starts with half a dozen Shy Guys and sucks your paint. In addition, it takes away all 1-up mushrooms, but you can still activate the card wheel once per round and get new 1-up mushrooms in this way.
Fighting Roy is not particularly difficult: you can use virtually any type of card and cause him decent damage with jumps, hammers and flowers. The problem is rather the defense, because Roy wears a fat Cannon, with which he literally shoots the stolen paint in the face. You can use them to color your cards afterwards, but you have to accept some unpleasant side effects:
If Roy shoots you with red, then Mario becomes aggressive and is suddenly very fast. This makes the timing for more jumps or stronger attacks much more difficult, which is why you limit yourself to Hammer cards in the following move.
If Roy shoots you green, Mario feels listless and is very slow. Once again, the timing changes when you have to press the A button for more jumps or stronger attacks. However, the effect is far less dramatic: you just need some patience and must not act too hastily.
If Roy shoots you with orange, Mario is inhibited. He can only use already colored cards in the following turn.
Shoot Roy with blue, then Mario feels the blues. He can use only blue card in the following move, for example ice flowers or throw hammers.
If Roy shoots you yellow, Mario is healed by the blues. He cannot use blue cards on the next turn.
If Roy shoots you violet, Mario is poisoned. He gets 10 damage points for every card you play.
Otherwise, Roy will jump on you from time to time, which will earn you 60 damage points unblocked. For this you can plan and execute the following move free of any side effects.
If Roy has only half of his life energy, he will be full of black paint on the screen. Immediately use the Washing Machine to undo the effect and heal yourself to endure Roy’s next attack. Then you beat him up with the best cards you have.Vortex Island
Enter the next room, save and go down the stairs. Under the stairs hides a Shy Guy who has lost his bucket. To your left, two snifits run around, while three more are in the background in front of the rolling band. Kill them all with your hammer and then destroy all the boxes to dust off a few cards.
Strike from the left against the green staircase, whereupon it rolls to the right. Climb them up, jump on the Crate and flatten one of the Shy Guys on the rolling band. Then jump on the tape instead of his and press the control cross up to call Huey. He will willingly make himself available as a bucket replacement and thus ensure you access to the next area.
Jump against the flag you pass and walk down the stairs to your right. Approach the boxes until the bombs on the other side become aware of you and ignite. Take a few steps away and wait until the boxes are broken. Run all the way to the right and stand under the transport system. Wait until a bowl of more bombs hovers over you and jump against them. Then lure the bombs to the remaining boxes on your left to blow them up as well.
Save and take care of the opponents on your left. Go all the way to the left and lure you in the same way as a few bombs. Run back to the right with them to blow up the Crate with the Koopa clan clan clan, and then fight against it. March back, hit the middle fence and save again. Attract a few bombs one last time and lead them to the giant bombs behind the fence.
Go forward quickly and flee quickly from the black paint. In between, try to destroy the boxes that each contain a card, and take care of the large cannonballs that you must not touch. Run past the third one, destroy the boxes to your right and hide briefly in the niche until another bullet rushes past you. Run back quickly and go to the next area. Save and run to the right again to escape the black paint. Run to the right, jump over the obstacle and run up the ramp on the edge. Then speed past the ball and escape through the big pipe before hiding in the small, green pipe.
Go back to the wall, whereupon it opens and enters the next area. Jump against the three question mark blocks, in which particularly powerful cards slumber, and follow the path to the last Save Block as well as two other question mark blocks. Open the big door and prepare for the last opponent of the game.