 Bowing at #122 on the Bubbling Under the Hot 100 on December 10, 1966, the single skyrocketed to #30 on December 17, 1966 , shot up again to #7 on December 24, 1966 , and peaked at #2 on the Hot 100 during the week of December 31, 1966 (behind the Monkees' "I'm a Believer"); made number 6 on the "Record Retailer" (UK) chart in February 1967; and was number one in Australia for five weeks from February 1967.On the Hot 100, "Believer" at #1 kept "Snoopy" at #2 from reaching the Hot 100 summit from December 31, 1966 through January 21, 1967, after which "Snoopy" fell off while "Believer" stayed at the top for another three weeks.The Royal Guardsmen went on to record several other Snoopy-themed songs, including two follow-ups to "Snoopy vs. the Red Baron" – "The Return of the Red Baron" and "Snoopy's Christmas" – together with other tunes such as "Snoopy for President".