Getting Hydra in City is a 3-Step process. Checking my *ahem* 100% complete checklist...you must do the following to unlock Hydra pieces X, Y and Z. Then you can collect all of them in the red boxes in City Trial randomly.
To get Hydra in Free Trial, you must simply unlock all of these, then you can use Hydra to your hearts content!
That I know of, you cannot unlock Hydra in Air Ride or Top Ride.
Read more: http://wiki.answers.com/How_do_you_get_the_Hydra_in_Kirby_Air_Ride#ixzz1cmQbsECX
Complete these City Trial goals to unlock Hydra for free run.
UnlockableHow to UnlockHydra part XDestroy all the grey houses on the beach in one gameHydra part YDestroy 150 rivals total in Desruction DerbyHydra part ZDestroy 1,500 enemies total in Kirby Melee
Collect all 3 pieces by breaking open red boxes in CityRide. I am almost sure you can never keep it after city ride.
KO a kirby 5 times while on their air ride machines in city trail
Waddle Dee is not an unlockable character in Kirby Air Ride instead they appear as stage obstacles.
In City Trial mode destroy all of the dilapidated house for Hydra Part X, KO over 1500 enemies in Stadium's Kirby Melee for Hydra Part Z, KO enemies over 150 times in Stadium's Destruction Derby for Hydra Part Y.
Yes besides them King Dedede and Meta Knight appear as playable characters as well as other air rides like the Swerve Star and Jet Star just to name some.
there is a kirby air ride
There is no galalax in Kirby Air Ride.
Kirby Air Ride happened in 2003.
You can get brown Kirby by defeating drag race 2 with the wing star under 29 seconds
Kill all the CPUs in citytrial in under one min
Play 100 vs. races.
In city trial you go to Mexico and get swine flu then ull unlock it