Ep 12. Happy Huggy Stuffy Bears / Secret Decoder Ring

In the episode titled "Happy Huggy Stuffy Bears / Secret Decoder Ring" in the fourth season of The Grim Adventures of Billy and Mandy, the story follows Billy and Mandy as they find out that their old toys, the Happy Huggy Stuffy Bears, have come to life. The two bears, Fluffy and Snuggles, become friends with the kids and they all have a lot of fun together. However, when the bears start growing really fast and become too big for Billy and Mandy's house, chaos ensues.

Meanwhile, Grim and the other supernatural beings are trying to find the Secret Decoder Ring, which has the power to unlock all secrets. The ring is rumored to be in the possession of a little girl named Mindy. Grim, Billy, and Mandy decide to team up to retrieve the ring from Mindy.

As Billy and Mandy try to figure out a way to get the Happy Huggy Stuffy Bears back to their original size, they end up discovering that the bears were created by a scientist named Dr. Velocity who is planning to use them for evil purposes. Billy and Mandy must now find a way to stop the mad scientist and save the bears.

Meanwhile, Grim and his team sneak into Mindy's house and try to take the Secret Decoder Ring. But things don't go as planned, and they end up encountering various obstacles and challenges along the way. They run into Mindy's overprotective mother and her vicious dog, as well as a giant maze filled with deadly traps.

Eventually, Billy and Mandy manage to shrink down the Happy Huggy Stuffy Bears and save them from Dr. Velocity's evil plan. Meanwhile, Grim and his team finally manage to retrieve the Secret Decoder Ring. However, they soon discover that the ring is actually a hoax and has no real power. In the end, Billy and Mandy learn a valuable lesson about the importance of friendship, while Grim and his team have a good laugh at the absurdity of their misadventure.

Overall, "Happy Huggy Stuffy Bears / Secret Decoder Ring" is a fun and entertaining episode that showcases the hilarious and absurd humor that has made The Grim Adventures of Billy and Mandy such a beloved show. With a mix of action, adventure, and comedy, this episode is sure to keep audiences of all ages entertained from start to finish.