Nintendo has published the weekly update for the Wii's Virtual Console featuring King's Knight (NES, 500 Wii Points) and Powerball (Genesis, 800 Points).

Full game details from Nintendo can be viewed at the jump.

Excerpt:

KING'S KNIGHT™ (NES®, 1 player, Rated E for Everyone - Mild Fantasy Violence, 500 Wii Points): In the kingdom of Izander, the fair Princess Claire has been kidnapped by a foul and insidious dragon, and it is the mission of four brave fighters to save her. Through five thrilling, fast-action stages, our gallant heroes-a knight, a wizard, a monster and a thief-will take on an army of incredible enemies. You must help them reach their goal, as you are now part of the team that will fight to free the princess from her imprisonment. Keep your wits about you, plan your strategy and set off on an exciting adventure.

POWERBALL™ (Sega Genesis, 1-2 players, Rated E for Everyone - Mild Fantasy Violence, 800 Wii Points): Eight different teams representing various nations are vying to become the POWERBALL champions, and you control one of the eight in your quest for the championship. A hybrid of games like rugby and football, POWERBALL is played on a 100-yard field. Try to score by either carrying the ball into your opponent's end zone or kicking it into your opponent's net for points. This one- or two-player game offers both exhibition and league play. Jump into a game of POWERBALL and try a brand new sport.