Each month I'll post 7 challenges (and a bonus challenge) which have a Viz rewards for completing them. First one to complete one of the challenges gets the Viz and the challenge is closed.

To take screenshots:
NES Games: Press 'A' key anytime during gameplay with NESCafe emulator
GB & GBC Games: Press F5 anytime during gameplay w/ Vizzed-AEPgb emulator
Other emulators currently do not support taking screenshots. Also note that taking more than 1 screenshot with the same game overwrites the previous.

Important: Anytime a challenge involves getting a high score, you must take the screenshot when you're in 'high score' mode.
To play in this mode, on the games page to the right of 'User Submitted Screenshots' there is 'High Scores Table', click the 'Compete for High Score'.
If your playing an NES game, you gotta press the 'T' key to submit your score, if your playing a GB or GBC game you have to press 'F5' key. Only screenshots taken in 'high score' more will be counted for challenges that involve getting a high score unless stated otherwise.

To submit an accomplished challenge:
All you do is paste the url to your screenshot taken in this thread (preferably in image format so everyone else can see). The screenshot must be the one hosted on vizzed board that you took.

This months challenges:

1. Super Mario Bros 3 2nd Run 250,000 score - 1,000 Viz
In the hack game Super Mario Bros 3 2nd run for NES, take a screenshot which shows a score of at least 250,000

2. Thunder and Lightning 500,000 score - 1,500 Viz
Take a screenshot of you getting a score of atleast 100,000 for NES

3. Super Mario Bros 3 - 2 Flutes - 1,000 Viz
Take a screenshot of you owning 2 flutes in SMB3 for NES

4. T&C Thrilla's Safari - 3rd level - 750 Viz
Take a screenshot of the 3rd level of T&C Thrilla's Safari for the NES

5. Pokemon Crystal Legendary Pokemon - 1,000
Take a screenshot of you owning a legendary Pokemon in Pokemon Crystal (gbc) from Pokedex

6. I choose you! Pikachu! - 1,000 Viz
In any Pokemon game, take a screenshot you fighting a Spearow with a level 25 or higher Pikachu

7. Mega Man 5 Boss Victory - 750 Viz
Take a screenshot of you defeating any boss in Mega Man 5 for the Game Boy

BONUS: Have the highest score in Mike Tysons Punch Out (nes) - 3,000 Viz
You do not have to submit your screenshot for this bonus challenge to this thread but on September 1st I'll look to see who has the highest submitted score for SMB

Awesome!!! This is a great idea Davideo. I am definitely going to have a go at the pokemon ones. And if I get them I will have a go at the rest.
I better start playing crystal more.