Chaos Emeralds
Chaos Emeralds are a group of multi-colored emeralds that appear in the Sonic the Hedgehog franchise. They possess mystical powers, and to quote Wikipedia, they "can turn thoughts into power, give energy to all living things, and be used to create nuclear or laser based weaponry."
Since the Sonichu comics "borrow" a lot of concepts from the Sonic universe (as well as the Pokémon universe), these objects from the Sonic continuity exist within the Sonichu continuity as well. Whether this constitutes ripping off Sonic is debatable; however, since most people agree that Sonic most likely borrowed the idea from Dragon Ball, which in turn took the idea from Journey to the West.
The Chaos Emeralds appear in virtually every Sonic the Hedgehog game. In the original game and its Game Gear entries, there were six emeralds. Sonic the Hedgehog 2 for the Sega Genesis upped the number to seven, where it remains to this day, the only exceptions being an obscure arcade game called Sonic the Fighters, where there were eight for who the hell knows what reason, and the Sonic Game Gear titles, where the collectible number of Emeralds varied from 5 to 6.
What these MacGuffins can do exactly is unknown, but they've been shown to have a variety of powers ove