For this achievement, you need to save all of the trapped "teensies" in a level, as well as gathering enough "Lums" (points) to earn a gold trophy in a level.
For convenience, here is a walkthrough I've written for Level 1 - "Once upon a Time":
*Be sure to smash all objects, turnips and enemies you see, and collect all Lums in your path to maximize your score!*
Teensies are numbered in order they are collected, not necessarily the order they appear in at the top right of the screen.
- At the start of the level, first head left, back through the tree. Wait for the circling teensie to come close, then jump and attack to free teensie #1.
- Head right until you reach a wooden platform with a caged teensie beside it. Jump to the platform, then jump attack the cage for teensie #2.
*An extra achievement can easily be earned here! Pull out the turnip to the right of the cage and jump attack it before it reaches the ground to unlock the "Turnip combo" Achievement for 10 points!*
- Go up the hill and down until you see two enemies with wooden shields below you.
*Another easy achievement can be earned right here! Rather than smash the enemies, simply fall on top of one of their shields and sit still until they attack you, and you will earn the "This ain't a platform!" Achievement for another 10 points!
- Jump up and ground smash the enemies (jump, then hold down LS and tap "X"). Head left under the path to reach a door. Hold up LS to enter. Jump and collect the paths of Lums as they pass you, until a gold teensie on a stake drops down. Hit the stake to free the princess, teensie #3.
- Head right, and follow the on-screen prompts to have your parter poke the enemy in the eye. Poke him again to push him into the ground, and jump past him. Jump on the blue pad to send you to the next area. Head left, tickle the enemy and attack him, then ground smash (Hold LS down, tap "X") the wood. Head back to the right, and press "B", or attack the teensie on the fishing line to free teensie #4.
- Tickle and kill the enemy to the right, then head inside the doorway. Continue to the right, following the prompts, until you reach two wooden walkways above the smoldering ground. Before lifting the wall to the right, drop down and use your partner to drop the wooden block on the left, jump over, kill the enemy and free teensie #5.
- Head right, then jump onto the wooden platform over some water. Use your partner to cut the rope above, then jump to the first rope. Swing back and forth to gain momentum, then jump and hold "A" to glide across to the next rope. Jump right and smash the cage to free teensie #6.
- Head right, and cut the left rope holding the spiked wood block, but before cutting the right one, climb up and over, drop down, and free teensie #7 below.
- Continue on to the long wooden block where you are instructed to use "LB" and "RB" to rotate it. Rotate it clockwise until it forms a ramp leading up to the higher ledge. Kill the enemy and head through the door. Rotate the wheel until you can jump to and reach the first gold hook. Hold on to it, then rotate the wheel clockwise until you can safely drop down to the spike-free wood. Head into the corner at the right, then then the wheel slightly counter-clockwise until you can jump to the next ledge, then the next hook. (Or just jump up and to the right to the next ledge). Head right and jump attack the cage to free teensie #8.
- Jump back down, and to the right, turning the wheel until you can reach the chain. Hold on and rotate the wheel counterclockwise with "RB" to reach the gold coin. Jump Hover over to the left edge, then wall jump to the top and head right through the doorway. Jump down to the spiked platform and cut both ropes one after the other. Cut the rope holding the spiked platform to the left, then jump over to free teensie #9.
- Continue right, kill the enemy and smash the cage to free the final teensie, #10.
- Continue right, using your partner to move the platforms, and jumping on any ghosts you need in order to get past. Tickle then kill the large enemy, and head right and into the doorway to complete the level!
If you smashed all the objects, destroyed all turnips, enemies, and collect all the Lums (or close to all), I ended with 615) you should have the 600 required Lums for the gold medal. If you also freed every teensie, the achievement should pop.
I hope this guide was helpful! Please vote and offer any feedback or suggestions you have. I just began playing the game, but will be continuing to add guides and solutions to every achievement in need, as I unlock them. Happy hunting!
- Dan