It dependes what level you are when you defeat Darkrai.
honestly, I dont think you can...
you have to be a quiet nature
That isn't possible you can only became a male-treeckoVladinator
You have to take the test if your starting the game,and once you see your Pokemon and you are not pleased just turn your DS off and do it again (if you have time)
Hardy type is Treecko.
you go to jouyous tower and look for him =] (after story mode)
purity forest
All Pokemon evolve at the same level in Pokemon Mystery Dungeon as in the other games. As such, Treecko is able to evolve at level 16 in Mystery Dungeon. However, evolution is only unlocked when you get far enough in the story.
The possible Starter Pokémon in "Pokémon Mystery Dungeon Explorers of Time" and "Pokémon Mystery Dungeon Explorers of Darkness" are Bulbasaur, Charmander, Squirtle, Pikachu, Meowth, Chikorita, Cyndaquil, Totodile, Treecko, Torchic, Mudkip, Skitty, Turtwig, Chimchar, Piplup and Munchlax and in "Pokémon Mystery Dungeon Explorers of Sky" the possible Starter Pokémon are Bulbasaur, Charmander, Squirtle, Pikachu, Vulpix, Eevee, Chikorita, Cyndaquil, Totodile, Phanpy, Treecko, Torchic, Mudkip, Skitty, Turtwig, Chimchar, Piplup, Shinx and Riolu.
You can't unless you are or he is your partner.
The leaders and partners you can be are: Eevee, Skitty, Riolu, Phanpy, Bulbasaur, Treecko, Turtwig, Pikachu, Chimchar, Charmander, Shinx, Mudkip, Piplup, Totodile, Squirtle, Torchic, Cyndaquil, and Vulpix. The Pokemon that only be partners are: Meowthand, and Munchlax.
in explorers of time and darkness: Mudkip, Treecko, Torchic, Squirtle, Charmander, Bulbasaur, Chikorita, Cyndaquil, Totodile, Piplup, Chimchar, Turtwig, Pikachu, Meowth, Munchlax and Skitty. In explorers of sky: all the Pokemon of time and darkness plus Shinx, Vulpix, Eevee, Bidoof and Riolu. P.s Meowth and Munchlax are only partners in sky not as hero