Part 21

Bowser Battle (Final Run-Through): Avoid Bowser's fist, electric beams, and falling meteors. Pound golden balls at Bowser, avoiding his spiked shell. In the second phase, dodge fiery breath and previous attacks. After 4 hits, you'll get the Grand Star.

Outer Space Phase: Float onto golden balls and pound them at Bowser when he is not curled up. Aim carefully to avoid his punches. After 3 hits, you win the Grand Star and finish the first run-through.

Post-Credits: Do not turn off the game during the credits. Collect Star Bits, coins, and ride Yoshi. Your progress saves, and World S is revealed.

Returning to the Ship: Re-open your game file. You can now switch between Mario and Luigi via the green 'L' door and red 'M' door under the ship's back.

Prankster Comet & World S: You'll need to complete the Prankster Comet at Bowser's Galaxy Generator. A letter from the Chimp directs you to World 6 for the Slimy Spring Galaxy.

Slimy Spring Galaxy - The Chimp's Coin Challenge: Talk to the Chimp. Get at least 10,000 points in 3 minutes. Coins and enemy hits are worth 100 points each. Use the water slide and Koopa Shell for coins. Shine your light at pods for 100 points. Avoid spiky balls and swim through brick walls. Use the Launch Star and long jump to coins. Stomp Paragoombas and collect coins. Shine light at Boos for points and coins. Reach the grassy cliff area for final coins. You win the Star for reaching 10,000 points. (High Score: 11,720 points)

World S Unlocked: You may receive 50 Star Bits from Rosalina. Access the World Map and head past World 6 to World S.

Mario Squared Galaxy - Make Mario a Star: Navigate a model of Mario made of lava, disappearing tiles, yellow platforms, and blue ? tiles. Activate the blue tiles to change them to yellow ! tiles. Head to the middle right for a 1-Up. Avoid fiery rocks and laser enemies. Activate the last blue tile, and the Star will appear on the first platform. Return there to collect it.

Rolling Coaster Galaxy - The Rainbow Road Roll: Jump on the rollerball and roll along fenced platforms to an automatic track. Roll through coins on the rainbow track. Jump over Bob-ombs. At the fork, go right. Roll down the middle, tilting the Control Stick to navigate towers and collect the Comet Medal. On the next track, hug the left side to avoid falling off. Tip slightly right, then left to avoid holes and reach a safe platform. Get on the automatic track to land in a hole, freeing the Star.

Twisty Trials Galaxy - Spinning and Spinning and Spinning: Jump on large spinning platforms, avoiding jutting pieces. Get the cloud flower. On the next stationary platform, wall jump for a 1-Up. The Comet Medal is on a spinning platform; jump/spin for it. Jump to the upside of a spinning platform when it's halfway to leveling out. Head straight to the Star on the last stationary platform.

Stone Cyclone Galaxy - Silver Stars on the Cyclone: Head straight up and get (1) on the block with an Octorok. Backtrack and long jump to the ! switch behind you. Pound it, then long jump to the other side of the Thwomp. Get (2) on the track and stand behind the Thwomp. Long jump right to the ! switch.