Onix is not on Pokepark.
No yanmega is not in pokepark but flygon is
Rikou isn't in pokepark
it's not in pokepark 1.
Sorry but there is not a zapdos in pokepark
There is no Ho-oh in Pokepark
you cant get entei in pokepark wii
bayleaf is not on pokepark wii only chikorita is
Pokepark is around $50 i know because i have it and bought it.
Pokepark 2 wonders beyond is coming out in february 27th
Sadly, there is no Mewtwo in Pokepark Wii. :( Best of luck. - Spiffi :3