These are them items that count toward the percentage on a file.
| Item | Number | Single Percentage | Total Percentage |
|---|---|---|---|
| Golden Banana | 201 | 0.4% | 80.4% |
| Battle Crown | 10 | 0.5% | 5% |
| Banana Fairy | 20 | 0.2% | 4% |
| Banana Medal | 40 | 0.2% | 8% |
| Boss Key | 8 | 0.25% | 2% |
| Nintendo Coin | 1 | 0.5% | 0.5% |
| Rareware Coin | 1 | 0.5% | 0.5% |
Display on Adventure Screen
The displayed number is a different one from the percentage computed with the items above. It's an 8 bit signed integer, which means it has no decimal places (it's not even rounded) and ranges from -128 to 127. If you happen to get 128% or more on a file, it will simply wrap down to -128 and continue counting up.
- An integer is a whole number.
- 8-bit means it has 2^8 (256) possible states.
- Signed means the range is divided into positive and negative numbers.
The Secret Ending Cutscene
If your total percentage is 101 or higher, the secret ending cutscene will show up after you beat K. Rool. Even if your file has a negative number on it, it will still show up because the real percentage is above 101.
The Unknown 101st Percent Trigger
There's some contradiction with the total percentage. If you add the above values together, you'll get 100.4%. Also, the 13th segment of Joe Wiewel's old run shows that the last Golden Banana is not needed to get 101%. At the beginning of this video, he has 99%. Then he collects 2 GB's and ends up with 101%, although 2 GB's are worth less than 1%. Therefore, it's currently assumed that some unknown trigger in the game adds at least 1% in a 101% run.