You should defiantly have a high level Chao for this, and I even recommend having your Chao reincarnate at least once, and have high stats. Need to Farm? A good area for drives would be Metal Harbor and Iron Gate.Д¬omplete all the Chao Karate modes. This will be unlocked once you have all Chao attributes past Level 10 (Yes all of them flying, power, swimming, running, stamina). Sorry to break it to you, but there is no way you can finish the Chao Racing or Karate without having a chao that is way beyond Level 10. In short, you will need the 155 Emblems form those categories. You do not need to complete everything else. This just means get an A Rank on all the Hero, Dark, and Cannon's Core missions. You'll unlock this pretty fast if your after the all A Ranks. I think either Dry Lagoon or Wild Canyon would be the easiest to complete this, since there requirements are pretty low and can be done very fast. Simply get all A Ranks in one character's stage. Also adding on a lot of lives might be good too. If your having trouble, try to replay some levels and get all the upgrades (such as the air necklace).

Does not require you to complete every mission for Cannon's, just the main story. Will unlock once beating the LAST Side of the game. This shouldn't be to hard, and even new players to this game can complete this with a few hours! Does not require you to complete every mission for Dark, just the main story. Will unlock once beating the DARK Side of the game.

Does not require you to complete every mission for Hero, just the main story. Will unlock once beating the HERO Side of the game. You receive this by completing the first level of either HERO or DARK story. You are practically guaranteed this achievement just by turning the game on.

Jewel mania level 180