Super Paper Mario

Super Paper Mario is a RPG-styled platformer developed by Intelligent Systems and published by Nintendo for the Wii. The gameplay is similar to the classic Super Mario games, but with the aesthetic qualities of the Paper Mario series, RPG-like elements like character dialogue and puzzles, and a blend of 2D and 3D platforming. The player starts out with only Mario, but unlocks Princess Peach, Luigi, and even Bowser through the game, and can change between them at any time.

The game was originally planned for the Nintendo GameCube in 2006, but Nintendo changed it to a Wii release due to declining GameCube sales.

Transition Issues
With EFB to Texture, Black/flickering characters appear at various transitions, such as entering pipes or doors and during any flipping effect. To fix: Under Graphics > Hacks. Set EFB Copied to RAM. Game Properties > Enable Bounding Box Calculation. Entering doors still doesn't work properly.

Freezing in chapter 6.1
When the King Sammer calls his vassals, the door opens but the game freezes.

To fix: Under Graphics > Hacks. Set EFB Copied to RAM. Game Properties > Disable Bounding Box Calculation.

You just have to disable it temporarily : just to open the door. Then you can re-enable it !