"ラルフ登場" by Takahito Eguchi, 大谷智哉 was released on February 15, 2012. With ラルフ登場 being less than two minutes long, at 1:35, we are fairly confident that this song is not explicit and is safe for all ages. Based on the duration of this song, this song duration is much smaller than the average song duration. There is only one song in リズム怪盗R 皇帝ナポレオンの遺産 オリジナル サウンドトラック (Vol. 1), so we believe that "ラルフ登場" is a single. In terms of popularity, ラルフ登場 is currently not that popular. In our opinion, the overall tone is not very danceable and projects negative sounds, such as being sad, depressed, or angry.
The tempo marking of ラルフ登場 by Takahito Eguchi, 大谷智哉 is Andante (at a walking pace), since this song has a tempo of 105 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 3/4.
This song has a musical key of F Major. This also means that this song has a camelot key of 7B. So, the perfect camelot match for 7B would be either 7B or 8A. While, 8B can give you a low energy boost. For moderate energy boost, you would use 4B and a high energy boost can either be 9B or 2B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 7A or 6B will give you a low energy drop, 10B would be a moderate one, and 5B or 12B would be a high energy drop. Lastly, 4A allows you to change the mood.