Turns out Naruto stopped using “Believe!” catchphrase during the Chunin Exams, at least in the English dubbed anime. However, it’s been long enough to be ingrained in every Naruto fan’s mind.
Naruto’s catchphrase garnered mixed reactions among fans of the series, with some thoroughly enjoying it while others hated it. on reddit, one user asked why the English dub removed the catchphrase after the Chunin Exams if it was popular with the fans. The user liked the saying, which seemed to be a minority opinion. Other users have commented that they either find it annoying or they just got used to how often Naruto says it. redditor u/Alliedoll42_42 said, “Ugh, no! Everyone laughed at it because of how often he said it.”
“Believe it!” was not Naruto’s original catchphrase. In the Japanese dub and manga, Naruto instead says “dattebayo”, but this phrase does not have a direct English translation. Thanks to the show’s DVD commentary, we know that the English dub decided to change the catchphrase to “Believe it!” since it matched the Japanese anime line. Unfortunately, fans found the new saying so annoying that it ended up being scrapped.
The problem arose hundreds of episodes later, when Naruto needed a way to recognize his mother, Kushina. In the manga, he finds out that she is his mother due to their similar speech, because they share a catchphrase, but it no longer has a slogan in the dub. The dub creators revealed in the DVD commentary that they eventually settled on “I know,” a slightly more accurate translation of “dattebayo.”