At the CN YMCA

At the CN YMCA is an animated web-series exclusive on the cartoon-network website. It's a crossover about the characters of 7 of the newest cartoon network shows hanging out at a YMCA-type recreation center called the CN YMCA. The main characters are Finn, Jake, Mordecai, and Rigby who work at the CN YMCA and regularly interact with the other characters who normally come to visit. Other characters include those from Adventure Time, Regular Show, Uncle Grandpa, Clarence, Steven Universe, Teen Titans Go, and the Amazing World of Gumball. Together they have lots of fun working together and solving crazy problems on a regular basis like Mordecai and Rigby accidentally getting turned into 5-year-olds by Uncle Grandpa or getting snowed in on summer vacation after the Ice King tried making snow-cones for everyone.

Finn
Finn is a 15-year-old human boy from Adventure Time who works at the CN YMCA as supervisor. He likes helping people and is always willing to help his friends whenever they're in a bind. No matter how small the problem may be.

Jake
Jake is a 30-year-old yellow dog from Adventure Time with "stretchy" abilities with let him change the shape and size of his body at will. He works at the CN YMCA as a cook, which is no surprise since he can cook really well. He doesn't usually use a cookbook and will usually use his own recipes such as Bacon Pancakes.

Mordecai
Mordecai is a 24-year-old 6-foot-tall blue-jay from Regular Show who is Rigby's best friend and the gardener at the CN YMCA. He is the most mature of the 4 main characters, normally correcting Rigby, Finn, and Jake of their immaturity. Especially Rigby.