I believe you obtain a star on your trainer card, and probably one of the professors gives you a pat on the back. Its one of the requirements to obtain a black trainer card though
nothing, unless it is just the sinnoh dex, then you will get the national dex
complete the pokedex then go to professor rowan and he will give you the national dex
Complete sinnoh dex
Catch all the Pokemon in the game
Yes There Is.
Completing the Sinnoh Dex will get you a Radar. Visit Prof. Rowan to claim it after you complete your Dex.
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Pal Park opens in Pearl after you complete the Sinnoh Pokedex and get the National Dex
no but you will find most pokeon at and around stark moutian.
you have to complete the sinnoh dex then go to the pal park,in the grass!
You can either use R4 cheats or battle in battle tower.
You beat it... then i guess professor will be pround of you