Yes , it is Poke park 3 wonders again
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Rikou isn't in pokepark
No yanmega is not in pokepark but flygon is
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it's not in pokepark 1.
Unfortunately no, you can only be pikachu. However you can play as different pokemon during the mini-games.
P-117 in PokePark Wii is Ponyta
bayleaf is not on pokepark wii only chikorita is
There are 4 save files.
Pokepark is around $50 i know because i have it and bought it.
Pokepark 2 wonders beyond is coming out in february 27th