These passwords have been copied from Rayquaza911's deathless 14:37 run in Any%, so you start each level with 3 lives (also I put spaces between each symbol to make them easier to copy):

Level 1 - No Password, just Start a New Game (65 Blue Crystals, 1 Bonus)

Level 2 - B C K 4 M 9 W R (22 Blue Crystals, 1 Bonus)

Level 3 - B C K 6 L 6 L 7 (24 Blue Crystals, 1 Bonus)

Level 4 - B C S S Y G 9 9 (86 Blue Crystals, 1 Bonus)

Level 5 - B L P W R T Q T (59 Blue Crystals, 1 Bonus)

Level 6 - B Q R 3 Q X Y G (90 Blue Crystals, 1 Bonus)

Level 7 - B X W B 7 7 7 7 (189 Blue Crystals, 1 Bonus)

Level 8 - C G 6 N 7 R V R (120 Blue Crystals, 1 Bonus)

Level 9 - C T M M 4 M V 9 (NO Blue Crystals, NO Bonus)

Level 10 - C T M N 3 K N P (NO Blue Crystals, NO Bonus)

TOTAL Collectibles - 655 Blue Crystals, 8 Bonuses

For some alternative passwords, you can also have a look at the GameFaqs page: https://gamefaqs.gamespot.com/gba/475762-disneys-atlantis-the-lost-empire/cheats