(Note: If you restart a level after getting some/all the collectibles, you won't have to collect them a second time, so if you run into a softlock just restart the level.)
Prologue: Just follow the money, there's nothing special about this section.
Wonka-Vites: Hit the trees with gobstoppers to get the purple and red candies. The sugar cubes are scattered around the area. The level ends at a door after you collect four Wonka-vites, you can backtrack if you need to.
Vine Balls: Use the harvesters on the tree at the start until you get all the green, yellow, and purple candies you need. The chocolate bars are scattered around the area. The level ends at a door once you clog all the pipes with vineballs, you can backtrack if you need to.
Candy Coater: The sugar cubes are at the start with the Oompa-Loompas, the fudge scrapers and chocolate bars are in the launcher puzzle room at the end. You can get peppermints from hitting the metal pylons (It didn't seem to work for me on the early ones but the one at the end always works), but the most efficient strat is to get them from the Wonka bots at the end. The level ends at a door after you defeat all the Wonka bots, you can backtrack if you need to.
Candy Boxes: Start by rounding up the Oompa-Loompas and filling the candy boxes as well as collecting the tree candies. Using the harvester on the trees will give you more candies with no cooldown time so take advantage of that. After the boxes are full you get the double jump ability, which is necessary to get the soda bottles. There are 21 of them in the main chocolate room, 7 as you climb the inside of the tower, and 2 in the slide out of the tower. Make sure you get those amounts before moving on as every new area entered closes off the previous one. The level ends when you get close to the chocolate river boat after refilling the river, you cannot backtrack.
Sheep N' Butterflies: The sodas and 12 chocolate bars are on the path up across the metal catwalks, the last 3 chocolate bars are unlocked after shearing all the sheep. 3 of the sugar cubes are on a table and the other 4 are given to you after collecting all butterflies. The brownies are inside the metal pylons. The level ends at a door after shearing all sheep and collecting all butterflies, you can "backtrack" since it's only one room.
Ball Candy: Once you leave each room you can't return so make sure not to miss any collectibles. The first room has 5 sodas, 3 chocolate bars, and 9 sugar cubes. You should have 14 sodas, 9 chocolate bars, and 11 sugar cubes by the end of room two. You should have 19 sodas, 11 chocolate bars, and 16 sugar cubes by the end of room three. The rest of the collectibles are in room four. The flasks are in the metal pylons and the rolling enemies, and the optimal route is to get as many as you can from the enemies that you have to kill throughout the level, then farming any missing ones at the last pylon. The level ends after pushing Violet into the juicer room and jumping in yourself afterwards, you can farm flasks at this point but you cannot backtrack.
Juicer: Once you leave each room you can't return so make sure not to miss any collectibles. The first room has 8 sodas, 4 chocolate bars, and 20 sugar cubes. By the end of room two you should have 19 sodas, 8 chocolate bars, and 36 sugar cubes. Everything else is in the third room. The lemons are in the rolling enemies and the metal pylons. You should be able to grab all 20 just from taking out the enemies. The level ends at a door after pushing Violet into the juicing chamber, you can farm lemons at this point but you cannot backtrack. (Pushing Violet out of the first room seems to be incredibly buggy, pushing her into the rightmost tunnel and watching the full cutscene is the only consistent way I've found to get her into room two without issues. If done incorrectly Violet will teleport back to room 1 after the cutscene and you'll have to manually push her out. Also she occasionally teleports into the wall in room 1 softlocking the game.)
Squirrels: There's 6 sugar cubes in the starting room with the boxes. After the left path is cleared you should haave 15 sodas, 7 chocolate bars, and 25 sugar cubes. After the right path is clear you should have the rest of the collectibles. The walnuts can be found in the trees. The level ends after returning to the large nut room after the right path is finished, you can backtrack if you need to.
Slide: This level is very tricky to 100% and there's pretty much no way you're getting everything in one go. If you're playing on emulator you're allowed to save state once at the beginning of the level in case you accidentally finish it early. If you reach the point where you have three high drops in a row and you're still missing collectibles then you have to restart the level in the menu, as the level will automatically end shortly after that. When you have path options take the right one first and then the left one later (not including the incinerator trap in between those two). Try to take it slow when you can to increase your chances of grabbing them.
Fizzy Lifting Drink: The 4 chocolate bars are all in the starting room as well as 2 fudge scrapers, with the third one in the room where you activate the squirrels. The sugar cubes are scattered on the ground on the first and second room. The sodas are all scattered around in the air and it's much easier to get them after you obtain the fizzy lifting drink. The level ends at a door after rounding up all the squirrels, you can backtrack if you need to.
Lava Room: In the main room there are 6 sodas, 2 chocolate bars, 1 fudge scraper, and 18 sugar cubes. After the right path you should have 33 sodas, 3 chocolate bars, 2 fudge scrapers, and 40 sugar cubes. After the left path you should have the rest of the collectibles. The flames are in the Wonka bots and metal bulbs. The best strat is to get them from the Wonka bots since you have to destroy a bunch of them in this level. The level ends at a door after destroying Wonka bots with the exploding candy, you can backtrack if you need to.
Final Room: Once you leave each room you can't return so make sure not to miss any collectibles. In the first Wonka-vite room there's 1 chocolate bar, 2 fudge scrapers, and 8 sugar cubes. You should have 10 chocolate bars, 6 fudge scrapers, and 14 sugar cubes after the second Wonka-vite room. The rest of the collectibles are in the third Wonka-vite room. The pink candies are in the robots and metal bulbs, and since you have to kill a bunch of robots the best route is to get it from them. The level ends once you get all the Oompa-Loompas sitting in their chairs back at the white room, you can farm for pink candies right before this but you can't backtrack.
Glass Elevator: After finishing the game you'll be met with the glass elevator select screen. There are four options: Up and Out is the ending cutscene, Chocolate Room takes you to the Wonka-vites split, Inventing Room takes you to the Ball Candy split, and Television Room takes you to the Final Room split. Each level is essentially a NG+ version of the original where you have all upgrades and the only objective is to collect golden Wonka tokens. Start with Chocolate Room and work down to make it easier to compare speed during the race.
Chocolate Room: The Wonka tokens are scattered around the area. Once you collect them all head to the white rectangular door at the start of the level to return to the glass elevator.
Inventing Room: You should have 8 Wonka tokens after the first room, 14 after the second, 22 after the third, and all 26 after the fourth. Once you get the tokens in each room you can immediately move onwards, but you cannot backtrack. Once you collect them all you can go to the glass elevator door in the fourth room.
Television Room: There's 10 Wonka tokens in the white room, 5 in the first Wonka-vite room, 5 in the second Wonka-vite room, and 5 in the third Wonka-vite room. You can access the Wonka-vite rooms by using the fizzy lifting drink to float up the tube by the large tv screen, since the one in the center of the white room will damage you. You can backtrack if you need to. Once you get all the tokens you should be met with a cutscene and a message telling you you've unlocked the bonus content. Timing stops once the final cutscene begins after that text box.
