pokepark 3 Wonders Again is actually not a real game. It was just made up by a fan. Nintendo never confirmed that Pokepark 3 was real.
Sadly, there is no Mewtwo in Pokepark Wii. :( Best of luck. - Spiffi :3
make friends with scraggy
Yes , it is Poke park 3 wonders again
Infernape: Found in the lava zone (have to fight chimchar until he says, "i bet your as good as my brother", about 3 times).
No yanmega is not in pokepark but flygon is
Rikou isn't in pokepark
You can find the 3 crates in the meadow zone in Pokepark near the area where you first meet Snivy. Look around that spot, and you should see the crates nearby.
it's not in pokepark 1.
Open all the bonus boxes in venasaurs attraction.
You get him by getting all the bonuses for empolions attraction
go to the flower zone and you'll find lucario there