Collect the indicated number DK Coins to unlock the corresponding option at the "Cheat" menu:

Choose between 5 or 20 lives after game over: 5 DK Coins
Make Diddy's hammer swing faster: 10 DK Coins
Wing Power-up Cheat: 15 DK Coins
Torch Power-up Cheat: 20 DK Coins
Crystal Stars Cheat: 25 DK Coins

Challenge mini-game bonus levels - Successfully complete the indicated levels in the listed Challenge mini-game to unlock the corresponding bonus level:

Banana Grab level 2: Successfully complete Banana Grab Level 1 with at least 80 Bananas.

Banana Grab level 3: Successfully complete Banana Grab Level 2 with at least 100 Bananas.

Banana Grab Max (Survival mode): Successfully complete Banana Grab Level 3 with at least 140 Bananas.

Booster Battle level 2: Successfully complete Booster Battle Level 1 by defeating Funky Kong.

Booster Battle level 3: Successfully complete Booster Battle Level 2 by defeating Dixie Kong.

Booster Battle Max (Survival mode): Successfully complete Booster Battle Level 3 by defeating Diddy Kong.

Orange Picker level 2: Successfully complete Orange Picker Level 1 with 60 oranges in 30 seconds.

Orange Picker level 3: Successfully complete Orange Picker Level 2 with 100 oranges in 30 seconds.

Orange Picker Max (Survival mode): Successfully complete Orange Picker Level 3 with 130 oranges in 30 seconds.

Rolling Panic level 2: Successfully complete Rolling Panic Level 1 with at least 100 points.

Rolling Panic level 3: Successfully complete Rolling Panic Level 2 with at least 150 points.

Rolling Panic Max (survival Mode): Successfully complete Rolling Panic Level 3 with at least 250 points.

Speed Climb level 2: Successfully complete Speed Climb Level 1 within 15 seconds.

Speed Climb level 3: Successfully complete Speed Climb Level 2 within 20 seconds.

Speed Climb Max (Survival mode): Successfully complete Speed Climb Level 3 within 28 seconds.

Throw 'n' Crush level 2: Successfully complete Throw 'n' Crush Level 1 within 40 seconds.

Throw 'n' Crush level 3: Successfully complete Throw 'n' Crush Level 2 within 50 seconds.

Throw 'n' Crush Max (Survival mode): Successfully complete Throw 'n' Crush Level 3 within 60 seconds.

Challenge mini-games - Successfully complete the indicated level to unlock the corresponding mini-game at the Challenge menu:

Banana Grab mini-game: Successfully complete Level 1-1, "Cranky's Teachin's".
Booster Battle mini-game: Successfully complete Level 5-1, "Space A-Go-Go".

Rolling Panic mini-game: Successfully complete Level 1-1, "Cranky's Teachin's".

Speed Climb mini-game: Successfully complete Level 1-1, "Cranky's Teachin's".

Throw 'n' Crush mini-game: Successfully complete Level 2-3, "Road To Ruins",

Bonus levels - Collect all Oil Barrels in the indicated level. Then, press X to have Funky fly you to the corresponding bonus level:

Little Chill 'n' Char Island: The five Oil Barrels in Chill 'n' Char Island
Little Ghost Island: The five Oil Barrels on Ghost Island
Little High High Island: Both Oil Barrels in Little High High Island
Little Lost Island: The five Oil Barrels on Lost Island
Little Sun Sun Island: The four Oil Barrels on Sun Sun Island

Bonus stages - Successfully complete the main storyline with the indicated number of Banana Coins to unlock the corresponding bonus stage in the "Extra" menu:

Stage 1: 10 Banana Coins
Stage 2: 20 Banana Coins
Stage 3: 30 Banana Coins
Stage 4: 40 Banana Coins
Stage 5: 50 Banana Coins
Stage 6: 60 Banana Coins
Stage 7: 70 Banana Coins
Stage 8: 80 Banana Coins
Stage 9: 90 Banana Coins
Stage 10: 100 Banana Coins
Stage 11: All 105 Banana Coins

Easy Gems - Press Left and Right when climbing a tree to shake it and reveal Gems that can be collected.

Programmer high scores - Get a "Triple-A" rank in all in-game survival challenges to view the staff high scores.