This has been a long time coming, but now, thanks to infinest on the Romhacking site, there is finally a patch available to play Kirby - Tilt 'n' Tumble without the tilt sensor cart. I tried it, and it works really well. It's quite a bit easier using the D-pad than playing with the original tilt sensor in my opinion.
Patch can be downloaded or applied at:
https://www.romhacking.net/hacks/6479/
Description from the Romhacking entry:
"This patch completely removes the accelerometer from the game an replaces it with the Game Boy Colors traditional controls. Moving or “Tilting” has been assigned to the D-Pad, the camera can now be moved by holding Select and using the D-Pad. Popping the floor up and jumping is done by pressing the A button while on the ground. When flying the floor can be popped up by pressing B and you shoot by pressing A as before. Most other actions have been relegated to the B button because of a lack of buttons. The mini games have also all been updated to support traditional controls. None of the tutorial screens have been edited though, so you’ll just have to give it a try.
The game has also been converted from MBC7 to MBC5 with traditional SRAM for saving. This allows booting the game on any flash cart that supports MBC5."
Patch can be downloaded or applied at:
https://www.romhacking.net/hacks/6479/
Description from the Romhacking entry:
"This patch completely removes the accelerometer from the game an replaces it with the Game Boy Colors traditional controls. Moving or “Tilting” has been assigned to the D-Pad, the camera can now be moved by holding Select and using the D-Pad. Popping the floor up and jumping is done by pressing the A button while on the ground. When flying the floor can be popped up by pressing B and you shoot by pressing A as before. Most other actions have been relegated to the B button because of a lack of buttons. The mini games have also all been updated to support traditional controls. None of the tutorial screens have been edited though, so you’ll just have to give it a try.
The game has also been converted from MBC7 to MBC5 with traditional SRAM for saving. This allows booting the game on any flash cart that supports MBC5."

