It takes a while to get anywhere near the amount of money you need to purchase these jetpods, so if you'd rather cheat...
Press
on the main menu to select
Continue and then press
to enter the password screen.
Enter the password
KBBKBBDBBQPB and then press
to start a level with the
Italian Racing Jetpod.
Fly around for a few seconds, then quit and repeat the steps above to enter this password:
ZQBPQQQQDMNB to start a level with the
Nippon Sports Jetpod.
Along with the default Jetpod you start with, you'll now have used all three Jetpods and the achievement should unlock!