Ep 18. Johnny's Big Sister Smackdown / Johnny vs. Bling Bling 4

Johnny Test season 4 episode 18 is titled "Johnny's Big Sister Smackdown / Johnny vs. Bling Bling 4". The episode follows the misadventures of Johnny Test, a young boy who loves science and experiments. In the first installment, "Johnny's Big Sister Smackdown," Johnny's big sister Susan gets a new talking doll that she won't let Johnny play with. He tries to take it from her, but Susan warns him that if he touches it, she'll give him a "big sister smackdown".

Despite Susan's warning, Johnny sneaks into her room and takes the doll anyway. Susan discovers that the doll is missing and sets out to find Johnny and get it back. Meanwhile, Johnny tries to use the doll's talking feature to impress his crush, Gil. However, the doll malfunctions and causes chaos throughout the house. Susan eventually catches up with Johnny, and they have an epic sibling showdown.

In the second installment, "Johnny vs. Bling Bling 4," Johnny faces off against his rival, Bling Bling. Bling Bling, a wealthy and arrogant boy, has always had a crush on Susan, and he believes that Johnny is constantly getting in the way of his chances with her.

Bling Bling challenges Johnny to a series of competitions, from a cooking contest to a chess match. Johnny is determined to win, but he soon realizes that Bling Bling has rigged the competitions in his favor. Johnny and his friend, Dukey, work together to come up with a plan to turn the tables on Bling Bling and win once and for all.

"Johnny's Big Sister Smackdown / Johnny vs. Bling Bling 4" is a hilarious and action-packed episode of the popular animated series, Johnny Test. Fans of the show will love watching Johnny and Susan butt heads, while newcomers will enjoy the show's zany humor and fast-paced storytelling. With its colorful animation and lovable characters, Johnny Test is sure to entertain audiences of all ages.