Sonic & Knuckles

Sonic & Knuckles is a 1994 platform video game in the Sonic the Hedgehog series, developed by Sonic Team and the Sega Technical Institute for the Sega Genesis. In addition to being a standalone game, through a system dubbed "lock-on technology," Sonic & Knuckles acts as an expansion pack to both Sonic the Hedgehog 2 and Sonic the Hedgehog 3, the latter with which it was developed in tandem, also included as unlockables for Sonic Mega Collection. The Virtual Console release of the game emulates this function: it will detect if the player has the other games in the Wii's memory, and provide the user with a menu to select which combination of games they wish to play.

Problems
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Slowdown in Special Stages
During the "Collect the Blue Spheres" Special Stages, the game will lag when a lot of spheres are on screen. This is a fault of Dolphin's emulated CPU not matching up perfectly with the Wiis. Changing the "emulated CPU Clock" to ~140% will fix the slowdown.

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