How do I unlock the code for lagoonas locker?

It is easy... Go to her locker ( Which is the blue one obiously ) and type in the numbers 20-5-25 and follow the arrows like is the arrow is pointing right you turn the locker thingy right to the correct number. Also lagoona said in a text message "Stop by my locker and get my swim cap on your way to the pool, combonation 20-5-25." if that dosent help then oh well that is how I got passed your hard part, and I finished the game.

Make sure the locker is "sparkling" by choosing that as your mission in your diary. On Wii, point your remote at it and twist your wrist to make the combonation lock move to the correct numbers, once on the number, make sure by looking underneath the lock to see that the number is 20, then press "A" then twist your wrist to make it stop on 5, press "A" then twist to 25 and press"A". It should just drop open and you automatically get her suit or cap in your purse, or if that's full it goes into your locker storage. Good luck!

you need to keep going one way if that does not work go the other way... it will tell you when you did the numbers right... make sure the arrow is pointing at the number you need it on... i cant remember much but i think you need to press the skull button when you finish.