21.

Super Mario Galaxy 2: #37 - Speedruns... (Gameplay Walkthrough)

Super Mario Galaxy 2: #36 - The Finale (Gameplay Walkthrough)

Super Mario Galaxy 2: #35 - The Best Episode Ever!!! (Gameplay Walkthrough)

Super Mario Galaxy 2: #34 - Throwback Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #33 - Slimy Spring Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #32 - Hardest Galaxy Ever???? (Gameplay Walkthrough)

Super Mario Galaxy 2: #31 - Having a Bad Day (Gameplay Walkthrough)

Super Mario Galaxy 2: #30 - Melty Monster Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #29 - The Chimp's Bowling Challenge (Gameplay Walkthrough)

Super Mario Galaxy 2: #28 - Bowser Jr's Boomsday Machine (Gameplay Walkthrough)

Super Mario Galaxy 2: #27 - Shiverburn Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #26 - Secret Star & Comets! (Gameplay Walkthrough)

Super Mario Galaxy 2: #25 - Slipsand Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #24 - Boo Moon Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #23 - Fleet Glide Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #22 - Hardest Star Yet! (Gameplay Walkthrough)

Super Mario Galaxy 2: #21 - Bowser's Gravity Gauntlet (Gameplay Walkthrough)

Super Mario Galaxy 2: #20 - Starshine Beach Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #19 - Chompworks Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #18 - Glamdozer Boss Fight (Gameplay Walkthrough)

Super Mario Galaxy 2: #17 - Speedrun Comets (Gameplay Walkthrough)

Super Mario Galaxy 2: #16 - Supermassive Galaxy & Honeyhop Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #15 - Megahammer Boss Fight (Gameplay Walkthrough)

Super Mario Galaxy 2: #14 - The Chimp Returns (Gameplay Walkthrough)

Super Mario Galaxy 2: #13 - Losing My Mind (Gameplay Walkthrough)

Super Mario Galaxy 2: #12 - Rise of the Blood Pressure (Gameplay Walkthrough)

Super Mario Galaxy 2: #11 - Haunty Halls Galaxy (Gameplay Walkthrough)

Super Mario Galaxy 2: #10 - Bowser's Lava Lair (Gameplay Walkthrough)

Super Mario Galaxy 2: #9 - Wild Glide Galaxy & Cosmic Cove Galaxy (Gameplay Walkthrough)